This Is A Standardized Test About Advance Placement!
Advanced Placement (AP) is a program in the United States and Canada created by the College Board which offers college-level curricula and examinations to high school students. American colleges and universities may grant placement and course credit to students who obtain high scores on the examinations.
- 1.
Blood does not
- A.
Transport a variety of nutrients
- B.
Help to stabilize the pH of extracellular fluids.
- C.
Participate in the initiation of blood clotting.
- D.
Produce plasma hormones.
- E.
Help to regulate body temperature.
Correct Answer
D. Produce plasma hormones.Explanation
Blood does not produce plasma hormones. Hormones are produced by endocrine glands such as the pituitary gland, thyroid gland, and adrenal glands. These hormones are then released into the bloodstream to be transported to target cells and organs where they regulate various bodily functions. While blood plays a crucial role in transporting hormones, it does not produce them itself.Rate this question:
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- 2.
The buffy coat does not contain
- A.
Lymphocytes
- B.
Granulocytes
- C.
Erythrocytes
- D.
Agranulocytes
- E.
Platelets
Correct Answer
C. ErythrocytesExplanation
The buffy coat is a layer of blood that contains white blood cells and platelets. It does not contain erythrocytes, which are red blood cells responsible for carrying oxygen.Rate this question:
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- 3.
The hematocrit is _____ of the total blood volume
- A.
Less than 1%
- B.
47% to 63% 47% to 63%
- C.
25% to 37%
- D.
42% to 45%
- E.
37% to 52%
Correct Answer
E. 37% to 52%Explanation
The correct answer is 37% to 52%. Hematocrit is a measure of the percentage of red blood cells in the total blood volume. A normal hematocrit range for men is typically between 37% and 52%, while for women it is usually between 36% and 48%. This range is important for assessing the oxygen-carrying capacity of the blood and diagnosing conditions such as anemia or polycythemia.Rate this question:
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- 4.
_____ is not found in plasma
- A.
Glycogen
- B.
Fibrinogen
- C.
Glucose
- D.
Urea
- E.
Albumin
Correct Answer
A. GlycogenExplanation
Glycogen is not found in plasma because it is a storage form of glucose in the liver and muscles, not a component of blood plasma. Plasma is the liquid component of blood that contains various proteins, electrolytes, hormones, and waste products, but not glycogen. Glycogen is converted into glucose when the body needs energy, and glucose can be found in plasma.Rate this question:
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- 5.
____ is a protein not commonly found in plasma
- A.
Albumin
- B.
Hemoglobin
- C.
Transferrin
- D.
Prothrombin
- E.
Fibrinogen
Correct Answer
E. FibrinogenExplanation
Fibrinogen is a protein not commonly found in plasma. Fibrinogen is an important protein involved in the clotting process of blood. It is converted into fibrin during the clotting process, which helps in the formation of blood clots. While albumin, hemoglobin, transferrin, and prothrombin are all proteins commonly found in plasma, fibrinogen is an exception and is not commonly found in plasma.Rate this question:
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- 6.
____ would not decrease colloid osmotic pressure (COP) in blood
- A.
Severe liver failure
- B.
A diet predominantly based on red meat
- C.
Starvation
- D.
An extremely low-protein diet
- E.
Hypoproteinemia
Correct Answer
B. A diet predominantly based on red meatExplanation
A diet predominantly based on red meat would not decrease colloid osmotic pressure (COP) in blood. COP is primarily determined by the concentration of proteins in the blood, specifically albumin. Red meat is a good source of protein, so a diet rich in red meat would likely provide an adequate amount of protein to maintain COP. Severe liver failure, starvation, an extremely low-protein diet, and hypoproteinemia can all lead to a decrease in COP as they result in a decrease in protein levels in the blood.Rate this question:
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- 7.
____ is the most abundant protein in plasma
- A.
Insulin
- B.
Creatine
- C.
Bilirubin
- D.
Albumin
- E.
Creatinine
Correct Answer
D. AlbuminExplanation
Albumin is the most abundant protein in plasma. It is synthesized in the liver and plays a crucial role in maintaining osmotic pressure, transporting various substances such as hormones, fatty acids, and drugs, and regulating pH. It is responsible for maintaining the balance of fluids between the blood vessels and tissues. Insulin is a hormone produced by the pancreas that regulates blood sugar levels. Creatine is a compound found in muscle cells that provides energy for muscle contractions. Bilirubin is a yellow pigment produced during the breakdown of red blood cells. Creatinine is a waste product of muscle metabolism that is excreted by the kidneys.Rate this question:
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- 8.
Serum is essentially identical to plasma except for the absence of __________.
- A.
Fibrinogen
- B.
Nitrogenous wastes
- C.
Platelets
- D.
Glucose
- E.
Albumin
Correct Answer
A. FibrinogenExplanation
Serum is the liquid component of blood that remains after the blood has clotted and the clot has been removed. It is very similar to plasma, but it lacks fibrinogen, which is a protein involved in blood clotting. This is why serum is often used in laboratory tests and medical procedures that require the absence of clotting factors. Therefore, the correct answer is fibrinogen.Rate this question:
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- 9.
Tissues can become edematous (swollen) when
- A.
Colloid osmotic pressure (COP) is high.
- B.
There is hyperproteinemia.
- C.
The concentration of sodium and proteins in blood is high
- D.
Hematocrit is high.
- E.
There is a dietary protein deficiency.
Correct Answer
B. There is hyperproteinemia.Explanation
When tissues become edematous (swollen), it means that there is an abnormal accumulation of fluid in the tissues. One possible cause of tissue edema is high colloid osmotic pressure (COP). However, the correct answer states that tissues can become edematous when there is hyperproteinemia. Hyperproteinemia refers to an increased level of proteins in the blood. Proteins play a crucial role in maintaining the balance of fluid in the body. Therefore, when there is an excess of proteins in the blood, it can lead to fluid accumulation in the tissues, resulting in edema.Rate this question:
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- 10.
Myeloid hemopoiesis in adults happens in the
- A.
Thymus
- B.
Spleen
- C.
Red bone marrow
- D.
Yellow bone marrow
- E.
Liver
Correct Answer
C. Red bone marrowExplanation
In adults, myeloid hemopoiesis occurs in the red bone marrow. Red bone marrow is responsible for the production of red blood cells, white blood cells, and platelets. It is found in the spongy bone, such as the vertebrae, ribs, sternum, and pelvis. The red bone marrow contains stem cells that differentiate into various blood cell types, ensuring the continuous production of these cells throughout life. The other options listed (thymus, spleen, yellow bone marrow, and liver) are not involved in myeloid hemopoiesis in adults.Rate this question:
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- 11.
The viscosity of blood is due more to _____________ than to any other factor.
- A.
Fibrin
- B.
Albumin
- C.
Sodium
- D.
Erythrocytes
- E.
Nitrogenous wastes
Correct Answer
D. ErythrocytesExplanation
The viscosity of blood is due more to erythrocytes than to any other factor. Erythrocytes, or red blood cells, are the most abundant cells in the blood and contribute significantly to its viscosity. Their shape, size, and concentration in the blood affect its flow properties. The presence of erythrocytes causes blood to be thicker and more resistant to flow, leading to its higher viscosity.Rate this question:
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- 12.
Erythrocytes transport oxygen and
- A.
Defend the body against pathogens.
- B.
Initiate blood clotting.
- C.
Regulate erythropoiesis
- D.
Transport nutrients.
- E.
Transport some carbon dioxide.
Correct Answer
E. Transport some carbon dioxide.Explanation
Erythrocytes, or red blood cells, are responsible for transporting oxygen from the lungs to the body's tissues. However, they also play a role in transporting some carbon dioxide, which is a waste product of cellular respiration. As blood circulates through the body, erythrocytes pick up carbon dioxide from the tissues and carry it back to the lungs, where it is expelled during exhalation. This helps to maintain the balance of gases in the body and ensure that oxygen is efficiently transported to the tissues.Rate this question:
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- 13.
Most oxygen is transported bound to
- A.
The plasma membrane of erythrocytes.
- B.
Alpha chains in hemoglobin.
- C.
Beta chains in hemoglobin.
- D.
Delta chains in hemoglobin.
- E.
Heme groups in hemoglobin.
Correct Answer
E. Heme groups in hemoglobin.Explanation
Oxygen is transported in the blood by binding to the heme groups in hemoglobin. Hemoglobin is a protein found in red blood cells, and each hemoglobin molecule contains four heme groups. These heme groups have iron ions that bind to oxygen molecules, allowing for efficient oxygen transport throughout the body. The plasma membrane of erythrocytes, alpha chains, beta chains, and delta chains in hemoglobin are not directly involved in the binding and transport of oxygen.Rate this question:
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- 14.
If all the molecules of hemoglobin contained in RBCs were free in the plasma,
- A.
It would considerably increase blood oxygen carrying capacity.
- B.
It would facilitate delivery of oxygen into tissues supplit would facilitate delivery of oxygen into tissues supplied by small capillaries.
- C.
It would facilitate oxygen diffusion into cells distant from blood capillaries.
- D.
It would significantly increase blood osmolarity
- E.
It would drastically increase osmotic colloid pressure
Correct Answer
D. It would significantly increase blood osmolarityExplanation
If all the molecules of hemoglobin contained in RBCs were free in the plasma, it would significantly increase blood osmolarity. Hemoglobin is a large protein molecule that has a high molecular weight. When it is contained within red blood cells, it does not contribute to the osmolarity of the blood. However, if it were free in the plasma, it would add to the overall solute concentration and increase the osmolarity of the blood. This would have implications for fluid balance and could potentially lead to changes in cell volume and function.Rate this question:
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- 15.
An increased erythropoietin (EPO) output by the kidneys would lead to all of the following except
- A.
Increased hypoxemia
- B.
Increased blood osmolarity
- C.
Increased RBC production
- D.
Increased blood viscosity
- E.
Increased hematocrit
Correct Answer
A. Increased hypoxemiaExplanation
An increased erythropoietin (EPO) output by the kidneys would lead to increased RBC production, increased blood viscosity, increased hematocrit, and increased blood osmolarity. However, it would not lead to increased hypoxemia. Hypoxemia refers to a low level of oxygen in the blood, and increased EPO output would actually stimulate the production of more red blood cells, which would help to increase oxygen-carrying capacity and potentially alleviate hypoxemia.Rate this question:
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- 16.
Many RBCs die in the
- A.
Stomach and small intestine
- B.
Spleen and liver
- C.
Red bone marrow
- D.
Lymph nodes and thymus
- E.
Stomach and liver
Correct Answer
B. Spleen and liverExplanation
RBCs have a lifespan of around 120 days, after which they are removed from circulation and broken down. The spleen and liver play a crucial role in this process. The spleen filters the blood, removing old and damaged RBCs, while the liver breaks down the components of the RBCs, such as hemoglobin, for recycling. Therefore, the spleen and liver are responsible for the elimination of many RBCs from the body.Rate this question:
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- 17.
All these can lead to polycythemia except
- A.
Cancer of the erythropoietic line of the red bone marrow.
- B.
Iron deficiency
- C.
Dehydration
- D.
Emphysema
- E.
Excessive aerobic exercise
Correct Answer
B. Iron deficiencyExplanation
Polycythemia is a condition characterized by an increased number of red blood cells in the bloodstream. Iron deficiency is not a cause of polycythemia, but rather a condition that can lead to anemia, which is characterized by a decrease in the number of red blood cells. Polycythemia can be caused by factors such as dehydration, emphysema, and excessive aerobic exercise, as these conditions can lead to an increase in the production of red blood cells. Additionally, certain cancers of the erythropoietic line of the red bone marrow can also cause polycythemia.Rate this question:
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- 18.
______________ is more likely to cause anemia than any of the other factors below.
- A.
High altitude
- B.
Air pollution other than by carbon monoxide
- C.
Renal disease
- D.
Smoking
- E.
Any factor that creates a state of hypoxemia
Correct Answer
C. Renal diseaseExplanation
Renal disease is more likely to cause anemia than any of the other factors listed. Renal disease can lead to a decrease in the production of erythropoietin, a hormone that stimulates the production of red blood cells in the bone marrow. Without enough erythropoietin, the body is unable to produce an adequate number of red blood cells, leading to anemia. High altitude, air pollution, smoking, and any factor that creates a state of hypoxemia may contribute to anemia, but they are not directly linked to the decreased production of erythropoietin like renal disease.Rate this question:
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- 19.
Anemia has these potential consequences except
- A.
Blood viscosity is increased
- B.
The individual is lethargic
- C.
Blood osmolarity is reduced
- D.
Blood resistance to flow is reduced
- E.
More fluid transfers from the bloodstream to the intercellular spaces.
Correct Answer
A. Blood viscosity is increasedExplanation
Anemia is a condition characterized by a decrease in the number of red blood cells or a decrease in the amount of hemoglobin in the blood. This leads to a reduced oxygen-carrying capacity of the blood. The potential consequences of anemia include lethargy, reduced blood osmolarity, reduced blood resistance to flow, and more fluid transferring from the bloodstream to the intercellular spaces. However, one consequence that does not occur in anemia is an increase in blood viscosity. Anemia actually leads to a decrease in blood viscosity due to the reduced number of red blood cells or hemoglobin.Rate this question:
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- 20.
What is the final product of the breakdown of the organic nonprotein moiety of hemoglobin?
- A.
Biliverdin
- B.
Bilirubin
- C.
Globin
- D.
Heme
- E.
Iron
Correct Answer
B. BilirubinExplanation
Bilirubin is the final product of the breakdown of the organic nonprotein moiety of hemoglobin. When hemoglobin is broken down, heme is converted into biliverdin, which is then further converted into bilirubin. Bilirubin is then released into the bloodstream and transported to the liver where it is conjugated and eventually excreted in the bile.Rate this question:
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- 21.
Correction of hypoxemia is regulated by
- A.
A self-amplifying mechanism
- B.
An enzymatic amplification
- C.
A positive feedback loop.
- D.
A negative feedback loop.
- E.
A cascade effect
Correct Answer
D. A negative feedback loop.Explanation
The correction of hypoxemia is regulated by a negative feedback loop. In this mechanism, when the oxygen levels in the body decrease (hypoxemia), it triggers a response to increase the oxygen supply. This response includes increasing the respiratory rate and depth, increasing heart rate, and constricting blood vessels to redirect blood flow to vital organs. Once the oxygen levels return to normal, the feedback loop reduces the response, maintaining homeostasis. This negative feedback loop helps to regulate and stabilize oxygen levels in the body.Rate this question:
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- 22.
A deficiency of _____________ can cause pernicious anemia.
- A.
Vitamin C
- B.
Iron
- C.
Vitamin B12
- D.
EPO secretion
- E.
Folic acid
Correct Answer
C. Vitamin B12Explanation
A deficiency of vitamin B12 can cause pernicious anemia. Vitamin B12 is essential for the production of healthy red blood cells. Without enough vitamin B12, the body is unable to properly form red blood cells, leading to pernicious anemia. This condition can cause fatigue, weakness, shortness of breath, and other symptoms. It is important to ensure an adequate intake of vitamin B12 through diet or supplements to prevent pernicious anemia.Rate this question:
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- 23.
Sickle-cell disease is not
- A.
Caused by a recessive allele that modifies the structure of hemoglobin
- B.
A hereditary hemoglobin defect.
- C.
Advantageous to protect carriers against malaria
- D.
A cause of malaria
- E.
A cause of amenia
Correct Answer
D. A cause of malariaExplanation
Sickle-cell disease is caused by a recessive allele that modifies the structure of hemoglobin, resulting in abnormal red blood cells. These sickle-shaped cells can cause blockages in blood vessels, leading to various health issues. However, carriers of the sickle-cell trait, who have one copy of the allele, are actually protected against malaria. Malaria is caused by the Plasmodium parasite, which cannot easily invade and reproduce in sickle-shaped red blood cells. Therefore, the presence of the sickle-cell allele in carriers provides an advantage against malaria infection.Rate this question:
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- 24.
The ABO blood group is determined by _____________ in the plasma membrane of RBCs.
- A.
Glycolipids
- B.
Glycoproteins
- C.
Antibodies
- D.
Antigen-antibody complexes
- E.
Agglutinins
Correct Answer
A. GlycolipidsExplanation
The ABO blood group is determined by glycolipids in the plasma membrane of RBCs. Glycolipids are molecules that consist of a carbohydrate chain attached to a lipid. These glycolipids act as antigens on the surface of red blood cells and are recognized by antibodies in the plasma. The presence or absence of specific glycolipids determines an individual's blood type, whether it is A, B, AB, or O. The antibodies in the plasma can bind to these glycolipids, leading to agglutination or clumping of the red blood cells.Rate this question:
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- 25.
Type A blood can safely donate RBCs to _____________ and can receive RBCs of type ___________.
- A.
O; AB
- B.
AB; O
- C.
A; B
- D.
B; A
- E.
O; O
Correct Answer
B. AB; OExplanation
Type A blood can safely donate RBCs to individuals with AB blood type because individuals with AB blood type have both A and B antigens on their red blood cells, and individuals with type A blood have A antigens. Type A blood can receive RBCs of type O because individuals with type O blood have neither A nor B antigens on their red blood cells, making it compatible with type A blood.Rate this question:
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