Biology Exam - Some Basic Knowledge And Facts About Blood
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Blood is a body fluid in humans and other animals that delivers necessary substances such as nutrients and oxygen to the cells and transports metabolic waste products away from those same cells. In vertebrates, it is composed of blood cells suspended in blood plasma.
Biology Exam - Some basic knowledge and facts about Blood
- 1.
Do red blood cells have a nucleus
- A.
No
- B.
Yes
Correct Answer
A. NoExplanation
Red blood cells do not have a nucleus. This is because during their development, the nucleus is expelled to create more space for hemoglobin, the protein responsible for carrying oxygen. As a result, red blood cells lack DNA and cannot divide or repair themselves. This adaptation allows them to be more flexible and efficient in their main function of transporting oxygen throughout the body.Rate this question:
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- 2.
What kind of structure do red blood cells have
- A.
Biconcave
- B.
Triconcave
- C.
Uniconcave
- D.
Option 4
Correct Answer
A. BiconcaveExplanation
Red blood cells have a biconcave structure, meaning they are concave on both sides. This unique shape allows them to have a larger surface area, which enhances their ability to carry oxygen and carbon dioxide throughout the body. The biconcave shape also gives red blood cells flexibility, allowing them to squeeze through narrow capillaries and deliver oxygen to tissues efficiently.Rate this question:
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- 3.
What do red blood cells also contain
- A.
Plasma
- B.
Hemoglobin
- C.
Platelets
- D.
Option 4
Correct Answer
B. HemoglobinExplanation
Red blood cells contain hemoglobin, a protein molecule that carries oxygen from the lungs to the body's tissues and organs. Hemoglobin also helps transport carbon dioxide, a waste product, from the tissues back to the lungs for exhalation. It gives red blood cells their characteristic red color and is essential for the proper functioning of these cells in delivering oxygen throughout the body.Rate this question:
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- 4.
- How many oxygen or CO2 can bond to a hemoglobin?
- A.
2 oxygen and 1 CO2
- B.
4 oxygens and 4 CO2 can bind to a hemoglobin
- C.
1 O and 2 CO2
- D.
Option 4
Correct Answer
B. 4 oxygens and 4 CO2 can bind to a hemoglobinExplanation
Hemoglobin is a protein found in red blood cells that is responsible for carrying oxygen from the lungs to the tissues and exchanging it for carbon dioxide. Each hemoglobin molecule can bind to four oxygen molecules and also has the ability to bind to four carbon dioxide molecules. This allows for efficient transport and exchange of oxygen and carbon dioxide in the body.Rate this question:
- 5.
What are the compositions of whole blood?
- A.
Erythrocytes
- B.
-bully coat
- C.
Plasma consists
- D.
All
Correct Answer
D. AllExplanation
The correct answer is "all." This means that the compositions of whole blood include erythrocytes, bully coat, and plasma.Rate this question:
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- 6.
What is in plasma of blood?
- A.
Water
- B.
Proteins: regulatory proteins, globulins, albumins, fibrinogen
- C.
Other solutes: electrolytes, nutrients, respiratory gases
- D.
All
Correct Answer
D. AllExplanation
Plasma is the liquid component of blood and it contains all the mentioned components: water, proteins (regulatory proteins, globulins, albumins, fibrinogen), and other solutes (electrolytes, nutrients, respiratory gases). Therefore, the correct answer is "all".Rate this question:
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- 7.
What are the 5 types of leukocytes and what is the function of each?
- A.
Neutrophils: fight against pathogens
- B.
Eosinophils: destroy parasitic worms
- C.
Basophil: releases histamine and heparin during allergic reaction
- D.
Lymphocytes: produce antibodies
- E.
Monocytes: phagocytes pathogens, bacteria, and viruses
- F.
All
Correct Answer
F. All -
- 8.
What is erythrocyte? What did we learn about the structure in lecture?
- A.
Erythrocytes are red blood cells
- B.
They have a biconcave structure so they can move throughout the vessels
- C.
All
- D.
Option 4
Correct Answer
C. AllExplanation
The given answer, "all," is correct because erythrocytes are indeed red blood cells, and they do have a biconcave structure that allows them to move throughout the blood vessels.Rate this question:
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- 9.
Where is red blood cells made in? how long they live for? And where do they go through phagocytize?
- A.
Red blood cells are made in the bone marrow
- B.
Red blood cells can live for 120 days
- C.
They phagocytize in the spleen or liver
- D.
All
Correct Answer
D. AllExplanation
Red blood cells are made in the bone marrow. They have a lifespan of approximately 120 days. After their lifespan, they are phagocytized in either the spleen or the liver.Rate this question:
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- 10.
What are white blood cells
- A.
Granulocytes
- B.
Erythrocytes
- C.
Leukocytes
- D.
Option 4
Correct Answer
C. LeukocytesExplanation
White blood cells, also known as leukocytes, are a type of blood cell that plays a crucial role in the immune system. They are responsible for defending the body against infections and foreign substances. Leukocytes are produced in the bone marrow and are found in the bloodstream and lymphatic system. They can be further classified into different types, including granulocytes, which are characterized by the presence of granules in their cytoplasm. Erythrocytes, on the other hand, are red blood cells that are responsible for carrying oxygen to the body's tissues. Therefore, the correct answer for this question is leukocytes.Rate this question:
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- 11.
Function of leukocytes
- A.
Produces iron
- B.
Fights against diseases
- C.
Option 3
- D.
Option 4
Correct Answer
B. Fights against diseasesExplanation
Leukocytes, also known as white blood cells, are an essential part of the immune system. Their main function is to protect the body against diseases and infections. They do this by identifying and destroying harmful pathogens, such as bacteria, viruses, and fungi. Leukocytes are responsible for initiating an immune response, which includes the production of antibodies and the activation of other immune cells. Therefore, the correct answer is "fights against diseases."Rate this question:
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- 12.
What is a platelet?
- A.
Red blood cell
- B.
A platelet is involves with blood clotting
- C.
Leukocyte
- D.
Option 4
Correct Answer
B. A platelet is involves with blood clottingExplanation
A platelet is involved in blood clotting. Platelets are small, colorless cell fragments present in the blood. When there is an injury or damage to blood vessels, platelets become activated and form a clot to prevent excessive bleeding. They adhere to the damaged area and release chemicals that attract more platelets, forming a plug. This plug helps in stopping the bleeding and initiating the process of wound healing. Therefore, platelets play a crucial role in the clotting process and maintaining hemostasis in the body.Rate this question:
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- 13.
How many granulocytes are there
- A.
5
- B.
3
- C.
1
- D.
Option 4
Correct Answer
B. 3 -
- 14.
Function of neutrophils
- A.
Releases histamine and heparin during allergic reaction, 0-5% of leukocytes
- B.
Granulocytes that fight against pathogens and is 50-70% of total leukocytes
- C.
Destroys parasitic worms, 1-4% of leukocytes
- D.
Option 4
Correct Answer
B. Granulocytes that fight against pathogens and is 50-70% of total leukocytesExplanation
Neutrophils are a type of white blood cell that are part of the body's immune system. They are granulocytes, which means they contain granules filled with enzymes and chemicals that help them fight against pathogens. Neutrophils make up 50-70% of the total leukocytes in the body. They are responsible for phagocytosis, which is the process of engulfing and destroying bacteria and other foreign substances. They are also involved in the inflammatory response, releasing histamine and heparin during allergic reactions.Rate this question:
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- 15.
Function of eosinophils
- A.
Destroys parasitic worms, 1-4% of leukocytes
- B.
Releases histamine and heparin during allergic reaction, 0-5% of leukocytes
- C.
Granulocytes that fight against pathogens and is 50-70% of total leukocytes
- D.
Option 4
Correct Answer
A. Destroys parasitic worms, 1-4% of leukocytesExplanation
Eosinophils are a type of white blood cell that play a role in the immune response against parasitic infections. They are responsible for destroying parasitic worms. Eosinophils make up only a small percentage of the total leukocytes, typically ranging from 1-4%.Rate this question:
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- 16.
Function of basophil?
- A.
Granulocytes that fight against pathogens and is 50-70% of total leukocytes
- B.
Destroys parasitic worms, 1-4% of leukocytes
- C.
Releases histamine and heparin during allergic reaction, 0-5% of leukocytes
- D.
Option 4
Correct Answer
C. Releases histamine and heparin during allergic reaction, 0-5% of leukocytesExplanation
Basophils are a type of granulocyte that are responsible for releasing histamine and heparin during an allergic reaction. They make up about 0-5% of the total leukocytes in the body. Histamine is released by basophils to cause inflammation and increase blood flow to the affected area, while heparin helps to prevent blood clotting. This response is part of the body's immune system and is aimed at defending against potential allergens or irritants.Rate this question:
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- 17.
How many agranulocytes are there
- A.
2
- B.
5
- C.
1
- D.
Option 4
Correct Answer
A. 2Explanation
Agranulocytes are a type of white blood cells that lack granules in their cytoplasm. There are two types of agranulocytes: lymphocytes and monocytes. Lymphocytes are responsible for immune responses, while monocytes are involved in phagocytosis and immune defense. Therefore, the correct answer is 2, indicating that there are two types of agranulocytes.Rate this question:
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- 18.
Function of lymphocytes
- A.
Phagocytes pathogens, bacteria, viruses, 2-8% of leukocytes
- B.
Produce antibodies, 20-40% of leukocytes
- C.
Option 3
- D.
Option 4
Correct Answer
B. Produce antibodies, 20-40% of leukocytesExplanation
Lymphocytes are a type of white blood cell that play a crucial role in the immune system. They are responsible for producing antibodies, which are proteins that help to identify and neutralize harmful pathogens such as bacteria and viruses. Lymphocytes make up about 20-40% of all leukocytes, or white blood cells, in the body.Rate this question:
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- 19.
Function of monocytes
- A.
Phagocytes pathogens, bacteria, viruses, 2-8% of leukocytes
- B.
Produce antibodies, 20-40% of leukocytes
- C.
Option 3
- D.
Option 4
Correct Answer
A. pHagocytes pathogens, bacteria, viruses, 2-8% of leukocytesExplanation
Monocytes are a type of white blood cells that play a crucial role in the immune system. They function by engulfing and destroying pathogens, such as bacteria and viruses, through a process called phagocytosis. Monocytes account for 2-8% of all leukocytes in the body. The given answer accurately describes the function of monocytes as phagocytes of pathogens, bacteria, and viruses, and also mentions their percentage in leukocytes.Rate this question:
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Mar 20, 2023Quiz Edited by
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May 10, 2021Quiz Created by
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