Histology Lecture 12 (Blood #1)

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Histology Lecture 12 (Blood #1) - Quiz


Questions and Answers
  • 1. 

    What is blood?

    • A.

      A type of connective tissue, composed of a group of cells embedded in an extracellular matrix.

    • B.

      The largest of the plasma contents, and they don't come out of capillary pores

    • C.

      Transport many substances (carrier)

    • D.

      Alpha and beta globulins

    Correct Answer
    A. A type of connective tissue, composed of a group of cells embedded in an extracellular matrix.
    Explanation
    Blood is classified as a type of connective tissue because it is composed of cells that are embedded in an extracellular matrix. This matrix is made up of plasma, which is the largest component of blood. Unlike other plasma contents, blood cells do not come out of capillary pores. Blood serves as a carrier for transporting various substances throughout the body, and it also contains alpha and beta globulins.

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  • 2. 

    The blood accounts for how much of the body weight in men and women?

    • A.

      6% of the body weight. About 3 liters in women and 2.5 to6 liters in men

    • B.

      10% of the body weight. About 8 liters in women and 6.5 to7 liters in men

    • C.

      8% of the body weight. About 5 liters in women and 5.5 to6 liters in men

    • D.

      3% of the body weight. About 2 liters in women and 1.5 to3 liters in men

    Correct Answer
    C. 8% of the body weight. About 5 liters in women and 5.5 to6 liters in men
    Explanation
    Blood accounts for approximately 8% of the body weight in both men and women. In women, this amounts to about 5 liters, while in men it ranges from 5.5 to 6 liters.

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  • 3. 

    The extracellular matrix is called what?

    • A.

      RBC's

    • B.

      Thrombocytes.

    • C.

      Platelets

    • D.

      Plasma in blood

    Correct Answer
    D. Plasma in blood
    Explanation
    The correct answer is "Plasma in blood" because the extracellular matrix refers to the non-cellular components found outside of cells, and in the case of blood, plasma is the liquid component that makes up the extracellular matrix. It contains various proteins, electrolytes, hormones, and waste products, and acts as a medium for transporting nutrients, gases, and other substances throughout the body. RBCs, thrombocytes, and platelets are cellular components of blood and not considered part of the extracellular matrix.

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  • 4. 

    What is the liquid components of blood?

    • A.

      Erythrocytes, making up 65% of the whole blood in men, and 68% in women

    • B.

      WBC's, making up 45% of the whole blood in men, and 50% in women

    • C.

      Plasma, making up 55% of the whole blood in men, and 58% in women

    • D.

      Platelets, making up 40% of the whole blood in men, and 60% in women

    Correct Answer
    C. Plasma, making up 55% of the whole blood in men, and 58% in women
    Explanation
    The liquid component of blood is called plasma, which makes up 55% of the whole blood in men and 58% in women.

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  • 5. 

    What are the cellular components of blood?

    • A.

      Erythrocytes, Leukocytes, Platelets

    • B.

      Plasma, Leukocytes, Platelets

    • C.

      Proteins, Platelets, RBC's

    • D.

      Erythrocytes, Cancer Cells, RBC's

    Correct Answer
    A. Erythrocytes, Leukocytes, Platelets
    Explanation
    The cellular components of blood are erythrocytes, leukocytes, and platelets. Erythrocytes, also known as red blood cells, are responsible for carrying oxygen to the body's tissues. Leukocytes, or white blood cells, are part of the immune system and help to fight off infections and diseases. Platelets are small cell fragments that are involved in blood clotting to prevent excessive bleeding.

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  • 6. 

    Some people say that the platelets are a type of what?

    • A.

      RBC's

    • B.

      WBC's

    • C.

      Platelets

    • D.

      Plasma

    Correct Answer
    B. WBC's
    Explanation
    Platelets are not a type of white blood cells (WBCs). Platelets, also known as thrombocytes, are small, colorless cell fragments that are involved in the clotting process. They are formed in the bone marrow and play a crucial role in preventing excessive bleeding. White blood cells, on the other hand, are responsible for immune responses and fighting off infections. Therefore, the correct answer is not WBCs.

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  • 7. 

    What is Erythrocytes or RBC's?

    • A.

      The main cells of the blood, making up about 55% of the whole blood in men, and 58% in women.

    • B.

      The main cells of the blood, making up about 45% of the whole blood in men, and 42% in women.

    • C.

      The secondary cells of the blood, making up about 40% of the whole blood in men, and 60% in women.

    • D.

      The secondary cells of the blood, making up about 70% of the whole blood in men, and 80% in women.

    Correct Answer
    B. The main cells of the blood, making up about 45% of the whole blood in men, and 42% in women.
    Explanation
    Erythrocytes, also known as red blood cells (RBCs), are the main cells of the blood. They make up approximately 45% of the whole blood in men and 42% in women. This is because women tend to have a slightly lower red blood cell count compared to men. Red blood cells are responsible for carrying oxygen to the body's tissues and removing carbon dioxide.

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  • 8. 

    What are Platelets also called?

    • A.

      Gases

    • B.

      Hormones

    • C.

      Electrolytes

    • D.

      Thrombocytes

    Correct Answer
    D. Thrombocytes
    Explanation
    Platelets are also known as thrombocytes. Thrombocytes are small, colorless cell fragments found in the blood. They play a crucial role in blood clotting, preventing excessive bleeding when a blood vessel is damaged. Platelets adhere to the site of injury and form a plug, which helps in the formation of a blood clot. Therefore, thrombocytes is the correct term used to refer to platelets.

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  • 9. 

    WBC's and platelets make up how much of the whole blood?

    • A.

      60%

    • B.

      40%

    • C.

      10%

    • D.

      Less than 1%

    Correct Answer
    D. Less than 1%
    Explanation
    The correct answer is "Less than 1%". This is because white blood cells (WBCs) and platelets make up a very small portion of the whole blood. While red blood cells (RBCs) are the majority, WBCs and platelets are present in much lower concentrations. WBCs are responsible for immune responses and platelets help in blood clotting, but their numbers are relatively small compared to RBCs. Therefore, they make up less than 1% of the whole blood.

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  • 10. 

    Centrifugation of blood will separate it into how many layers?

    • A.

      4

    • B.

      6

    • C.

      3

    • D.

      9

    Correct Answer
    C. 3
    Explanation
    Centrifugation of blood separates it into three distinct layers: the top layer consists of plasma, the middle layer contains white blood cells and platelets, and the bottom layer is made up of red blood cells. This separation is based on the differences in density and size of the blood components, allowing for the isolation and analysis of specific components.

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  • 11. 

    What does the lower layer consist of?

    • A.

      Plasma

    • B.

      The erythrocytes

    • C.

      A buffy coat that represents the platelets and WBC's

    • D.

      Hematocrit

    Correct Answer
    B. The erythrocytes
    Explanation
    The lower layer consists of the erythrocytes. Erythrocytes, also known as red blood cells, are the most abundant cells in the blood. They are responsible for carrying oxygen to the body's tissues and removing carbon dioxide. The other options mentioned, such as plasma, buffy coat, and hematocrit, do not specifically refer to the lower layer of the blood.

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  • 12. 

    What does the Middle layer of blood consist of?

    • A.

      A buffy coat that represents the platelets and WBC's

    • B.

      Plasma

    • C.

      The erythrocytes

    • D.

      Hematocrit

    Correct Answer
    A. A buffy coat that represents the platelets and WBC's
    Explanation
    The middle layer of blood, known as the buffy coat, consists of platelets and white blood cells (WBCs). This layer is formed when blood is centrifuged, causing the heavier components like red blood cells to settle at the bottom and the lighter components like plasma to rise to the top. The buffy coat, located between the red blood cells and plasma, contains the platelets and WBCs, which play important roles in clotting and immune response, respectively.

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  • 13. 

    What does the upper layer of blood consist of?

    • A.

      WBC's

    • B.

      Urine

    • C.

      Plasma

    • D.

      Electrolytes

    Correct Answer
    C. Plasma
    Explanation
    The upper layer of blood consists of plasma. Plasma is the liquid component of blood that carries various substances such as hormones, nutrients, waste products, and antibodies. It also helps in regulating body temperature and maintaining blood pressure. Plasma makes up about 55% of the total blood volume and is crucial for transporting essential components throughout the body.

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  • 14. 

    Centrifugation of blood is used to calculate what?

    • A.

      Pores

    • B.

      Plasma

    • C.

      Hematocrit of patient

    • D.

      RBC's

    Correct Answer
    C. Hematocrit of patient
    Explanation
    Centrifugation of blood is a process that separates its components based on their density. By spinning the blood in a centrifuge, the heavier components, such as red blood cells, are forced to settle at the bottom, while the lighter components, such as plasma, remain at the top. The hematocrit of a patient refers to the percentage of red blood cells in their blood. Therefore, centrifugation of blood is used to calculate the hematocrit of a patient by measuring the volume of red blood cells compared to the total volume of blood.

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  • 15. 

    What is Hematocrit?

    • A.

      Hormones

    • B.

      Liver cell

    • C.

      The percentage of the total blood occupied by RBC's, 45% in men and 42% in women

    • D.

      The percentage of the total blood occupied by WBC's, 65% in men and 50% in women

    Correct Answer
    C. The percentage of the total blood occupied by RBC's, 45% in men and 42% in women
    Explanation
    Hematocrit refers to the percentage of the total blood volume that is occupied by red blood cells (RBCs). In men, the normal hematocrit level is around 45%, while in women it is around 42%. This measurement is important in determining the oxygen-carrying capacity of the blood and can be used to diagnose conditions such as anemia or polycythemia.

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  • 16. 

    What are the plasma components?

    • A.

      Water, Electrolytes, Waste products, Gases, WBC's, Plasma proteins, Nutrients.

    • B.

      RBC's, Electrolytes, Waste products, Gases, WBC's, Plasma proteins, Nutrients.

    • C.

      Water, Electrolytes, Waste products, Gases, Hormones, Plasma proteins, Nutrients.

    • D.

      RBC's, Electrolytes, Waste products, Gases, WBC's, Plasma proteins, Nutrients.

    Correct Answer
    C. Water, Electrolytes, Waste products, Gases, Hormones, Plasma proteins, Nutrients.
    Explanation
    The plasma components include water, electrolytes, waste products, gases, hormones, plasma proteins, and nutrients.

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  • 17. 

    All the components are dissolved in plasma except what?

    • A.

      Protons

    • B.

      Pores

    • C.

      Proteins

    • D.

      Liquid in blood

    Correct Answer
    C. Proteins
    Explanation
    Proteins are the correct answer because they are not dissolved in plasma. Plasma is the liquid component of blood and it contains various dissolved components such as ions, nutrients, waste products, hormones, and gases. However, proteins are too large to be dissolved in plasma and instead, they are carried within the plasma as suspended particles.

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  • 18. 

    The blood is what kind of tissue? Dynamic or static?

    • A.

      Dynamic

    • B.

      Static

    Correct Answer
    A. Dynamic
    Explanation
    Blood is considered a dynamic tissue because it is constantly moving and circulating throughout the body. It carries oxygen, nutrients, hormones, and waste products to and from various organs and tissues. The movement of blood is facilitated by the pumping action of the heart and the network of blood vessels. Additionally, blood undergoes continuous changes, such as the production of new blood cells and the removal of old or damaged cells, making it a dynamic and active tissue in maintaining overall body function.

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  • 19. 

    Proteins are dispersed as what?

    • A.

      Pores

    • B.

      Nutrients

    • C.

      Colloid

    • D.

      Carbons

    Correct Answer
    C. Colloid
    Explanation
    Proteins are dispersed as colloids. Colloids are a type of mixture where the particles of one substance are evenly dispersed throughout another substance. In the case of proteins, they are dispersed as colloids in various biological fluids, such as blood and lymph. This dispersion allows for the proteins to be transported and distributed effectively throughout the body, performing their various functions.

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  • 20. 

    What are Plasma proteins?

    • A.

      The smallest of the plasma contents, and they come out of capillary pores.

    • B.

      The largest of the plasma contents, and they don't come out of capillary pores.

    • C.

      Use it to measure blood viscosity

    • D.

      Maintains blood dynamic

    Correct Answer
    B. The largest of the plasma contents, and they don't come out of capillary pores.
    Explanation
    Plasma proteins are the largest of the plasma contents and they do not come out of capillary pores. This means that they remain within the blood vessels and do not leak into the surrounding tissues. These proteins play various important roles in the body, such as maintaining osmotic pressure, transporting substances, and regulating immune responses. Their large size prevents them from easily passing through the small pores of the capillaries, ensuring that they stay within the bloodstream.

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  • 21. 

    What kind of picture does the blood reflect?

    • A.

      It reflects a partial picture of the body, which is why we have to know the  abnormal physiological rate.

    • B.

      It reflects the whole picture of the body, which is why we have to know the normal and abnormal physiological rate.

    Correct Answer
    B. It reflects the whole picture of the body, which is why we have to know the normal and abnormal physiological rate.
    Explanation
    The blood reflects the whole picture of the body because it carries oxygen, nutrients, hormones, and waste products to and from various organs and tissues. By analyzing the blood, we can assess the overall health and functioning of the body. This is why it is important to know both the normal and abnormal physiological rates, as they can provide valuable information about any potential health issues or imbalances.

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  • 22. 

    What is a General Functions of the plasma proteins?

    • A.

      Establish an osmotic gradient between blood and interstitial fluid, 

    • B.

      Make with their derivatives and the plasma proteins the whole immune system.

    • C.

      First defenders against bacterial invasion

    • D.

      Clean up debris

    Correct Answer
    A. Establish an osmotic gradient between blood and interstitial fluid, 
    Explanation
    Plasma proteins play a crucial role in establishing an osmotic gradient between blood and interstitial fluid. This gradient helps in maintaining the balance of fluids and electrolytes between these two compartments. It is essential for various physiological processes such as regulating blood pressure, maintaining tissue hydration, and facilitating the exchange of nutrients and waste products. Additionally, plasma proteins also contribute to the immune system by interacting with their derivatives and other components to form a defense mechanism against bacterial invasion. They also aid in cleaning up debris and promoting tissue repair.

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  • 23. 

    What is Establishing an osmotic gradient between blood and interstitial fluid called?

    • A.

      Hydrolytic pressure

    • B.

      Glycoma

    • C.

      Colloid osmotic pressure

    • D.

      Partial osmotic pressure

    Correct Answer
    C. Colloid osmotic pressure
    Explanation
    Colloid osmotic pressure refers to the establishment of an osmotic gradient between blood and interstitial fluid. This pressure is created by the presence of large molecules, such as proteins, in the blood that cannot easily cross the capillary walls. As a result, these molecules exert an osmotic force that draws water from the interstitial fluid into the blood, helping to maintain fluid balance and prevent excessive fluid loss from the blood vessels.

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  • 24. 

    What does colloid osmotic pressure do?

    • A.

      Transport many substances

    • B.

      Are clotting factors

    • C.

      Prevents edema and maintains blood volume

    • D.

      Is important for blood (fibrin) clotting

    Correct Answer
    C. Prevents edema and maintains blood volume
    Explanation
    Colloid osmotic pressure refers to the pressure exerted by proteins, such as albumin, in the blood vessels. This pressure helps to prevent the leakage of fluid from the blood vessels into the surrounding tissues, thus preventing edema (swelling) and maintaining blood volume.

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  • 25. 

    Which one do you like?

    • A.

      Option 1

    • B.

      Option 2

    • C.

      Option 3

    • D.

      Option 4

    Correct Answer
    A. Option 1
  • 26. 

    What is a General Function of the plasma proteins?

    • A.

      They are the First Wave Of Phagocytic Cells invading sites of infection.

    • B.

      They present the Extruded Chromosomes of Meiotic Division as Barr Body in the Nucleus

    • C.

      Contribute to blood viscosity

    • D.

      Used to determine a person's sex

    Correct Answer
    C. Contribute to blood viscosity
    Explanation
    Plasma proteins contribute to blood viscosity. Blood viscosity refers to the thickness or stickiness of blood. Plasma proteins, such as albumin and fibrinogen, play a role in maintaining the viscosity of blood. They help regulate the flow of blood and prevent excessive bleeding or clotting. This function is important for proper circulation and maintaining the balance of fluids in the body.

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  • 27. 

    What is a General Functions of the plasma proteins?

    • A.

      Clotting factor

    • B.

      Breaking down of Histamine and Leukotrienes

    • C.

      Complete role in buffering changes in blood pH.

    • D.

      Partial role in buffering changes in blood pH.

    Correct Answer
    D. Partial role in buffering changes in blood pH.
    Explanation
    Plasma proteins have various functions in the body, including buffering changes in blood pH. However, they only play a partial role in this process, meaning that they contribute to maintaining the pH balance but are not solely responsible for it. Other factors, such as bicarbonate ions and the respiratory system, also play a role in buffering blood pH. Therefore, the correct answer is that plasma proteins have a partial role in buffering changes in blood pH.

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  • 28. 

    What is a General Functions of the plasma proteins?

    • A.

      Contributes to the transport of CO2

    • B.

      Lactate dehydrogenase

    • C.

      Provide energy in state of starvation.

    • D.

      Buffers acid

    Correct Answer
    C. Provide energy in state of starvation.
    Explanation
    Plasma proteins have various functions in the body, including contributing to the transport of CO2, acting as enzymes like lactate dehydrogenase, and buffering acids. However, one of their important roles is providing energy in a state of starvation. During periods of prolonged fasting or starvation, plasma proteins can be broken down into amino acids, which can then be used as an energy source by the body. This helps to sustain vital functions and prevent muscle wasting during times of nutrient scarcity.

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  • 29. 

    Which one do you like?

    • A.

      Option 1

    • B.

      Option 2

    • C.

      Option 3

    • D.

      Option 4

    Correct Answer
    A. Option 1
  • 30. 

    What is a function of albumins?

    • A.

      Retraction

    • B.

      Fibrinolysis

    • C.

      Transport many substances (carrier)

    • D.

      Vascular spasm

    Correct Answer
    C. Transport many substances (carrier)
    Explanation
    Albumins are a type of protein found in the blood that play a crucial role in transporting many substances throughout the body. They act as carriers for various molecules such as hormones, fatty acids, and drugs, ensuring their efficient delivery to different tissues and organs. This function of albumins is vital for maintaining homeostasis and supporting various physiological processes in the body.

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  • 31. 

    What is a function of albumins?

    • A.

      Directs internalization

    • B.

      Make greatest contribution to colloid osmotic pressure of plasma

    • C.

      Directs protein synthesis

    • D.

      Directs endocytosis

    Correct Answer
    B. Make greatest contribution to colloid osmotic pressure of plasma
    Explanation
    Albumins are a type of protein that is found in the plasma of the blood. One of their main functions is to maintain the colloid osmotic pressure of the plasma. This means that albumins help to regulate the movement of fluids between the blood vessels and the surrounding tissues. They do this by attracting water molecules and preventing them from leaving the blood vessels. This helps to maintain the proper balance of fluids in the body and prevents excessive fluid loss. Therefore, albumins make the greatest contribution to the colloid osmotic pressure of plasma.

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  • 32. 

    What are Globulins? (Alpha and beta globulins )

    • A.

      Are clotting factors

    • B.

      Do Pinocytosis

    • C.

      Do Exocytosis

    • D.

      Do Endcytosis

    Correct Answer
    A. Are clotting factors
    Explanation
    Globulins are a group of proteins found in the blood plasma. Alpha and beta globulins are two types of globulins. The correct answer states that globulins, specifically alpha and beta globulins, are clotting factors. This means that they play a crucial role in the process of blood clotting, which is necessary to prevent excessive bleeding. Clotting factors are essential for the formation of blood clots, which help to seal off wounds and promote healing. Therefore, the answer accurately describes the function of alpha and beta globulins.

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  • 33. 

    What are Globulins? (Alpha and beta globulins )

    • A.

      Stained deeply bluish or reddish-violet

    • B.

      Have abundant granules, which is why the nucleus is not well identified.

    • C.

      Transport many substances

    • D.

      Have 2 or 3 lobes.

    Correct Answer
    C. Transport many substances
    Explanation
    Globulins, specifically alpha and beta globulins, are proteins that are responsible for transporting various substances in the blood. They are stained deeply bluish or reddish-violet and have abundant granules, which makes it difficult to identify their nucleus. These proteins have 2 or 3 lobes and play a crucial role in carrying hormones, enzymes, lipids, and metal ions throughout the body.

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  • 34. 

    What are Globulins? ( Gamma globulins )

    • A.

      Are antibodies

    • B.

      Correspond to the slow-reacting substance of Anaphylaxis or SRS-A.

    • C.

      Dilate the blood vessels.

    • D.

      Make their walls more permeable.

    Correct Answer
    A. Are antibodies
    Explanation
    Globulins, specifically gamma globulins, refer to a group of proteins found in the blood that include antibodies. Antibodies are proteins produced by the immune system in response to foreign substances (antigens) in the body. They play a crucial role in the immune response by recognizing and neutralizing these antigens, helping to protect the body against infections. Therefore, the statement "Are antibodies" accurately describes the role of gamma globulins in the immune system. The other statements about dilating blood vessels and increasing their permeability are not directly related to globulins or antibodies.

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  • 35. 

    Albumins are major proteins where?

    • A.

      Larynx

    • B.

      Esophagus

    • C.

      Blood

    • D.

      Liver

    Correct Answer
    C. Blood
    Explanation
    Albumins are major proteins found in the blood. They are synthesized in the liver and play a crucial role in maintaining osmotic pressure, transporting hormones, drugs, and fatty acids, and regulating pH levels in the body. Therefore, the correct answer is Blood.

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  • 36. 

    The alpha and beta globulins are synthesized by what?

    • A.

      Gallbladder

    • B.

      Pharynx

    • C.

      Liver

    • D.

      Larynx

    Correct Answer
    C. Liver
    Explanation
    The alpha and beta globulins are synthesized by the liver. The liver is responsible for producing various proteins, including globulins, which are important for various functions in the body such as transport, immunity, and blood clotting. The gallbladder is involved in storing and releasing bile, the pharynx is a part of the throat, and the larynx is involved in the production of sound. Therefore, the liver is the correct answer as it is the organ responsible for synthesizing alpha and beta globulins.

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  • 37. 

    Gamma globulins are produced by what?

    • A.

      Anaphylactic reactions

    • B.

      Anaphylaxis

    • C.

      Lymphocytes (antibodies).

    • D.

      Fibrin clothing

    Correct Answer
    C. Lymphocytes (antibodies).
    Explanation
    Gamma globulins are a type of protein that are produced by lymphocytes, specifically B-cells, in response to the presence of foreign substances in the body. These proteins, also known as antibodies, play a crucial role in the immune system by recognizing and binding to specific antigens, such as bacteria or viruses, to help neutralize and eliminate them. Therefore, lymphocytes (antibodies) are responsible for the production of gamma globulins.

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  • 38. 

    What is a Characteristics of RBC's?

    • A.

      They count about 5 (million/mm3) in males, and less than that in females.

    • B.

      They count about 3 (million/mm3) in males, and less than that in females.

    • C.

      They count about 6 (million/mm3) in males, and more than that in females.

    • D.

      They count about 5 (million/mm3) in males, and more than that in females.

    Correct Answer
    A. They count about 5 (million/mm3) in males, and less than that in females.
    Explanation
    RBCs, or red blood cells, are responsible for carrying oxygen throughout the body. The given answer states that RBCs count about 5 (million/mm3) in males, and less than that in females. This is because males generally have a higher RBC count compared to females. This difference is due to the hormone testosterone, which stimulates the production of RBCs. Additionally, females may have a lower RBC count due to menstrual blood loss. Therefore, the given answer accurately reflects the characteristic of RBC count in males and females.

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  • 39. 

    What is the shape and size of RBC's?

    • A.

      Convex shape, with a size of 8X2X1 microns

    • B.

      Biconcave shape, with a size of 8X2X1 microns

    • C.

      Biconcave shape, with a size of 6X1X1 microns

    • D.

      Monoconcave shape, with a size of 8X2X1 microns

    Correct Answer
    B. Biconcave shape, with a size of 8X2X1 microns
    Explanation
    RBCs, or red blood cells, have a biconcave shape, meaning they are concave on both sides. They have a size of 8X2X1 microns. This unique shape allows RBCs to have a large surface area-to-volume ratio, which facilitates the efficient exchange of oxygen and carbon dioxide in the bloodstream. The biconcave shape also allows RBCs to be flexible and squeeze through narrow capillaries.

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  • 40. 

    What is the diameter of RBC's?

    • A.

      5-6m

    • B.

      6-7m

    • C.

      7-8 m

    • D.

      9-8m

    Correct Answer
    C. 7-8 m
  • 41. 

    What is the edges of RBC's?

    • A.

      1m thick

    • B.

      2m thick

    • C.

      2m thin

    • D.

      1m thin

    Correct Answer
    B. 2m thick
  • 42. 

    What is the center of RBC's?

    • A.

      1m thick

    • B.

      2m thick

    • C.

      3m thick

    • D.

      4m thick

    Correct Answer
    A. 1m thick
    Explanation
    The question is asking about the center of RBC's (red blood cells) in terms of thickness. The correct answer is 1m thick. This suggests that the center of RBC's is 1m in thickness.

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  • 43. 

    Which one do you like?

    • A.

      Option 1

    • B.

      Option 2

    • C.

      Option 3

    • D.

      Option 4

    Correct Answer
    A. Option 1
  • 44. 

    Does the RBC have a nucleus or organelle?

    • A.

      Has a a nucleus or organelle

    • B.

      Does not have a nucleus or organelle

    Correct Answer
    B. Does not have a nucleus or organelle
    Explanation
    RBCs, or red blood cells, do not have a nucleus or organelles. This is because during their maturation process, RBCs expel their nucleus and other organelles to make more space for hemoglobin, a protein that carries oxygen. This allows RBCs to have a biconcave shape and maximize their oxygen-carrying capacity. Therefore, RBCs are unique among cells in the body as they lack a nucleus and organelles.

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  • 45. 

    What is a Characteristics of RBC's?

    • A.

      Concentrates hemoglobin in it, and has more than 250 million hemoglobin molecules in it (red pigments).

    • B.

      Concentrates anaphylactic reactions in it, and has more than 250 million hemoglobin molecules in it (red pigments).

    • C.

      Responsible for lymphopoiesis

    • D.

      Responsible for WBC's

    Correct Answer
    A. Concentrates hemoglobin in it, and has more than 250 million hemoglobin molecules in it (red pigments).
    Explanation
    RBCs, or red blood cells, have the characteristic of concentrating hemoglobin in them. Hemoglobin is a protein that carries oxygen to the body's tissues and gives RBCs their red color. RBCs contain more than 250 million hemoglobin molecules, which allows them to efficiently transport oxygen throughout the body. This characteristic is essential for the proper functioning of RBCs and the delivery of oxygen to cells.

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  • 46. 

    How many enzymes are found in a mature red blood cell?

    • A.

      Many

    • B.

      Few

    Correct Answer
    B. Few
    Explanation
    A mature red blood cell, also known as an erythrocyte, is a specialized cell that is primarily responsible for carrying oxygen to different parts of the body. Unlike other cells in the body, red blood cells do not have a nucleus or other organelles, including enzymes. Therefore, the correct answer is "Few" enzymes are found in a mature red blood cell.

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  • 47. 

    What is the lifespan of RBC's?

    • A.

      120 days, then it's partially removed

    • B.

      120 days, then it's mostly removed by the spleen.

    • C.

      120 days, then it stabilizes

    • D.

      60 days, then it's mostly removed by the spleen.

    Correct Answer
    B. 120 days, then it's mostly removed by the spleen.
    Explanation
    RBCs, or red blood cells, have a lifespan of approximately 120 days. After this time, they are mostly removed by the spleen. This means that the spleen plays a crucial role in clearing out old or damaged RBCs from the bloodstream.

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  • 48. 

    Although the blood vessels has a smaller diameter than that of a red blood cell, the red blood cell can still pass through how?

    • A.

      Straight

    • B.

      Horizontally

    • C.

      Spiral way

    • D.

      Vertically

    Correct Answer
    C. Spiral way
    Explanation
    The red blood cell can pass through the blood vessels in a spiral way. This is because the red blood cell is flexible and can change its shape to fit through narrow spaces. As it moves through the blood vessels, it can twist and turn, allowing it to navigate through the smaller diameter of the vessels. This spiral movement helps the red blood cell to efficiently transport oxygen and nutrients throughout the body.

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  • 49. 

    Why does RBC's pass through spirally?

    • A.

      Plasma

    • B.

      Albumins

    • C.

      Convex shape

    • D.

      Biconcave shape

    Correct Answer
    D. Biconcave shape
    Explanation
    RBCs pass through spirally due to their biconcave shape. This unique shape allows RBCs to be flexible and change their shape as they move through narrow blood vessels, such as capillaries. The biconcave shape increases the surface area of the RBC, allowing for efficient gas exchange and the ability to carry oxygen to tissues. Additionally, the biconcave shape helps RBCs to stack together, forming rouleaux, which enables them to flow smoothly through blood vessels.

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  • 50. 

    The biconcave shape is maintained by a structural protein called what?

    • A.

      Spectrin

    • B.

      Albumins

    • C.

      WBC's

    • D.

      Leukotrienes

    Correct Answer
    A. Spectrin
    Explanation
    Spectrin is a structural protein that helps maintain the biconcave shape of red blood cells. It forms a network of filaments along the inner surface of the cell membrane, providing support and stability. Without spectrin, red blood cells would lose their characteristic shape and become more fragile, leading to a shorter lifespan and potential health issues.

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Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Mar 21, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Apr 17, 2019
    Quiz Created by
    Ran Dom
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