Circulatory & Excretory System MCQ Quiz – Part 3
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This Circulatory & Excretory System MCQ Quiz helps aspirants revise important concepts related to the structure and functions of the human circulatory and excretory systems, which are frequently asked in competitive exams. Regular practice of these MCQs improves conceptual understanding and helps candidates answer biology questions quickly and accurately.
GK Series – Biology – Circulatory & Excretory System MCQ Quiz |
|
| Subject | Biology |
| Chapter | Circulatory & Excretory System |
| Part | 3 |
| Questions | 25 |
Who Should Attempt This Circulatory & Excretory System MCQ Quiz?
This Circulatory & Excretory System MCQ Quiz helps aspirants revise important concepts related to the structure and functions of the human circulatory and excretory systems, which are frequently asked in competitive exams. Regular practice of these MCQs improves conceptual understanding and helps candidates answer biology questions quickly and accurately.
Topics Covered in This Circulatory & Excretory System MCQ Quiz
This quiz includes MCQs based on important topics such as heart, blood, blood vessels, circulation of blood, components of blood, kidneys, nephrons, urine formation, and functions of the excretory system, along with other fundamental concepts related to human circulation and excretion.
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Question 1 of 25
1. Question
Red blood cells are also called
Correct
➤ Red blood cells are called erythrocytes.
➤ They are responsible for transport of oxygen.Incorrect
➤ Red blood cells are called erythrocytes.
➤ They are responsible for transport of oxygen. -
Question 2 of 25
2. Question
The shape of red blood cells is
Correct
➤ RBCs are biconcave in shape.
➤ This increases surface area for oxygen transport.Incorrect
➤ RBCs are biconcave in shape.
➤ This increases surface area for oxygen transport. -
Question 3 of 25
3. Question
Mature RBCs in humans lack
Correct
➤ Mature RBCs do not have a nucleus.
➤ This allows more space for hemoglobin.Incorrect
➤ Mature RBCs do not have a nucleus.
➤ This allows more space for hemoglobin. -
Question 4 of 25
4. Question
The life span of a red blood cell is about
Correct
➤ The lifespan of RBCs is about 120 days.
➤ After that, they are destroyed in the spleen.Incorrect
➤ The lifespan of RBCs is about 120 days.
➤ After that, they are destroyed in the spleen. -
Question 5 of 25
5. Question
Red blood cells are produced in the
Correct
➤ RBCs are formed in the bone marrow.
➤ This process is called erythropoiesis.Incorrect
➤ RBCs are formed in the bone marrow.
➤ This process is called erythropoiesis. -
Question 6 of 25
6. Question
The pigment present in RBC that carries oxygen is
Correct
➤ Hemoglobin is the oxygen-carrying pigment in RBCs.
➤ It gives blood its red color.Incorrect
➤ Hemoglobin is the oxygen-carrying pigment in RBCs.
➤ It gives blood its red color. -
Question 7 of 25
7. Question
The spleen is known as the
Correct
➤ Spleen destroys old and worn-out RBCs.
➤ Hence it is called the graveyard of RBCs.Incorrect
➤ Spleen destroys old and worn-out RBCs.
➤ Hence it is called the graveyard of RBCs. -
Question 8 of 25
8. Question
A decrease in hemoglobin level leads to
Correct
➤ Anemia is caused due to low hemoglobin levels.
➤ It reduces the oxygen-carrying capacity of blood.Incorrect
➤ Anemia is caused due to low hemoglobin levels.
➤ It reduces the oxygen-carrying capacity of blood. -
Question 9 of 25
9. Question
The main function of RBCs is to
Correct
➤ RBCs transport oxygen from lungs to tissues.
➤ They also carry carbon dioxide back to lungs.Incorrect
➤ RBCs transport oxygen from lungs to tissues.
➤ They also carry carbon dioxide back to lungs. -
Question 10 of 25
10. Question
The red color of blood is due to
Correct
➤ Hemoglobin gives blood its red color.
➤ It binds with oxygen to form oxyhemoglobin.Incorrect
➤ Hemoglobin gives blood its red color.
➤ It binds with oxygen to form oxyhemoglobin. -
Question 11 of 25
11. Question
White blood cells are also called
Correct
➤ White blood cells are called leukocytes.
➤ They help in defending the body against infections.Incorrect
➤ White blood cells are called leukocytes.
➤ They help in defending the body against infections. -
Question 12 of 25
12. Question
The main function of white blood cells is to
Correct
➤ WBCs protect the body from pathogens.
➤ They are a key part of the immune system.Incorrect
➤ WBCs protect the body from pathogens.
➤ They are a key part of the immune system. -
Question 13 of 25
13. Question
A very high increase in white blood cells causes
Correct
➤ Leukemia is a type of blood cancer.
➤ It involves abnormal increase of WBCs.Incorrect
➤ Leukemia is a type of blood cancer.
➤ It involves abnormal increase of WBCs. -
Question 14 of 25
14. Question
Platelets are also called
Correct
➤ Platelets are called thrombocytes.
➤ They play a role in blood clotting.Incorrect
➤ Platelets are called thrombocytes.
➤ They play a role in blood clotting. -
Question 15 of 25
15. Question
The main function of platelets is to
Correct
➤ Platelets help in blood clotting.
➤ They prevent excessive blood loss during injury.Incorrect
➤ Platelets help in blood clotting.
➤ They prevent excessive blood loss during injury. -
Question 16 of 25
16. Question
Blood clotting helps to
Correct
➤ Blood clotting prevents excessive bleeding.
➤ It forms a clot at the site of injury.Incorrect
➤ Blood clotting prevents excessive bleeding.
➤ It forms a clot at the site of injury. -
Question 17 of 25
17. Question
The ABO blood group system was discovered by
Correct
➤ Karl Landsteiner discovered the ABO blood group system.
➤ This classification is based on antigens present on RBCs.Incorrect
➤ Karl Landsteiner discovered the ABO blood group system.
➤ This classification is based on antigens present on RBCs. -
Question 18 of 25
18. Question
The universal donor blood group is
Correct
➤ Blood group O is considered universal donor.
➤ It can donate blood to all other groups.Incorrect
➤ Blood group O is considered universal donor.
➤ It can donate blood to all other groups. -
Question 19 of 25
19. Question
The universal recipient blood group is
Correct
➤ Blood group AB is the universal recipient.
➤ It can receive blood from all blood groups.Incorrect
➤ Blood group AB is the universal recipient.
➤ It can receive blood from all blood groups. -
Question 20 of 25
20. Question
Bombay blood group was discovered by
Correct
➤ Bombay blood group was discovered by Y.M. Bhende.
➤ It is a rare blood group found in India.Incorrect
➤ Bombay blood group was discovered by Y.M. Bhende.
➤ It is a rare blood group found in India. -
Question 21 of 25
21. Question
The Rh factor is related to
Correct
➤ Rh factor is a protein present on RBC surface.
➤ It is used to determine positive (+) or negative (−) blood group.Incorrect
➤ Rh factor is a protein present on RBC surface.
➤ It is used to determine positive (+) or negative (−) blood group. -
Question 22 of 25
22. Question
A person having Rh factor on RBC is called
Correct
➤ Presence of Rh factor makes a person Rh positive (Rh⁺).
➤ Absence means Rh negative (Rh⁻).Incorrect
➤ Presence of Rh factor makes a person Rh positive (Rh⁺).
➤ Absence means Rh negative (Rh⁻). -
Question 23 of 25
23. Question
The absence of Rh factor indicates
Correct
➤ If Rh factor is absent, the person is Rh negative.
➤ It is important in blood transfusion compatibility.Incorrect
➤ If Rh factor is absent, the person is Rh negative.
➤ It is important in blood transfusion compatibility. -
Question 24 of 25
24. Question
Excretion is the process of
Correct
➤ Excretion removes metabolic waste products from the body.
➤ It helps maintain internal balance (homeostasis).Incorrect
➤ Excretion removes metabolic waste products from the body.
➤ It helps maintain internal balance (homeostasis). -
Question 25 of 25
25. Question
The main excretory organ in humans is the
Correct
➤ Kidneys are the main excretory organs.
➤ They filter blood and produce urine.Incorrect
➤ Kidneys are the main excretory organs.
➤ They filter blood and produce urine.