Circulatory & Excretory System MCQ Quiz – Part 2
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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 |
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| Subject | Biology |
| Chapter | Circulatory & Excretory System |
| Part | 2 |
| 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
The thickest chamber of the human heart is
Correct
➤ Left ventricle has the thickest muscular wall.
➤ It pumps blood to the whole body at high pressure.Incorrect
➤ Left ventricle has the thickest muscular wall.
➤ It pumps blood to the whole body at high pressure. -
Question 2 of 25
2. Question
The valve between left ventricle and aorta is
Correct
➤ Aortic valve prevents backflow of blood from aorta to left ventricle.
➤ It ensures one-way flow of blood.Incorrect
➤ Aortic valve prevents backflow of blood from aorta to left ventricle.
➤ It ensures one-way flow of blood. -
Question 3 of 25
3. Question
The largest artery in the human body is
Correct
➤ Aorta is the largest artery in the human body.
➤ It carries oxygenated blood from heart to body.Incorrect
➤ Aorta is the largest artery in the human body.
➤ It carries oxygenated blood from heart to body. -
Question 4 of 25
4. Question
The largest vein in the human body is
Correct
➤ Inferior vena cava is the largest vein.
➤ It carries blood from lower body to heart.Incorrect
➤ Inferior vena cava is the largest vein.
➤ It carries blood from lower body to heart. -
Question 5 of 25
5. Question
The coronary arteries mainly supply blood to
Correct
➤ Coronary arteries supply oxygenated blood to heart muscles.
➤ They ensure proper functioning of the heart.Incorrect
➤ Coronary arteries supply oxygenated blood to heart muscles.
➤ They ensure proper functioning of the heart. -
Question 6 of 25
6. Question
Arteries carry blood
Correct
➤ Arteries carry blood away from the heart.
➤ They usually carry oxygenated blood (except pulmonary artery).Incorrect
➤ Arteries carry blood away from the heart.
➤ They usually carry oxygenated blood (except pulmonary artery). -
Question 7 of 25
7. Question
Veins carry blood
Correct
➤ Veins carry blood toward the heart.
➤ They usually carry deoxygenated blood (except pulmonary vein).Incorrect
➤ Veins carry blood toward the heart.
➤ They usually carry deoxygenated blood (except pulmonary vein). -
Question 8 of 25
8. Question
Which blood vessel has thick muscular walls?
Correct
➤ Arteries have thick elastic muscular walls.
➤ This helps them withstand high blood pressure.Incorrect
➤ Arteries have thick elastic muscular walls.
➤ This helps them withstand high blood pressure. -
Question 9 of 25
9. Question
Which blood vessels contain valves?
Correct
➤ Veins contain valves to prevent backflow of blood.
➤ This ensures one-way movement toward the heart.Incorrect
➤ Veins contain valves to prevent backflow of blood.
➤ This ensures one-way movement toward the heart. -
Question 10 of 25
10. Question
The smallest blood vessels in the body are
Correct
➤ Capillaries are the smallest blood vessels.
➤ They connect arteries and veins.Incorrect
➤ Capillaries are the smallest blood vessels.
➤ They connect arteries and veins. -
Question 11 of 25
11. Question
Exchange of gases and nutrients occurs in
Correct
➤ Capillaries allow exchange of gases, nutrients and waste.
➤ Their walls are one cell thick.Incorrect
➤ Capillaries allow exchange of gases, nutrients and waste.
➤ Their walls are one cell thick. -
Question 12 of 25
12. Question
Double circulation means blood passes through the heart
Correct
➤ In double circulation, blood passes through the heart twice in one cycle.
➤ It includes pulmonary and systemic circulation.Incorrect
➤ In double circulation, blood passes through the heart twice in one cycle.
➤ It includes pulmonary and systemic circulation. -
Question 13 of 25
13. Question
Pulmonary circulation is the flow of blood between
Correct
➤ Pulmonary circulation occurs between heart and lungs.
➤ It helps in oxygenation of blood.Incorrect
➤ Pulmonary circulation occurs between heart and lungs.
➤ It helps in oxygenation of blood. -
Question 14 of 25
14. Question
Systemic circulation is the flow of blood between
Correct
➤ Systemic circulation carries blood between heart and body.
➤ It supplies oxygen to body tissues.Incorrect
➤ Systemic circulation carries blood between heart and body.
➤ It supplies oxygen to body tissues. -
Question 15 of 25
15. Question
Double circulation was discovered by
Correct
➤ William Harvey discovered blood circulation.
➤ He explained double circulation in humans.Incorrect
➤ William Harvey discovered blood circulation.
➤ He explained double circulation in humans. -
Question 16 of 25
16. Question
The natural pacemaker of the heart is
Correct
➤ SA node (Sinoatrial node) is the natural pacemaker of the heart.
➤ It initiates the heartbeat rhythm.Incorrect
➤ SA node (Sinoatrial node) is the natural pacemaker of the heart.
➤ It initiates the heartbeat rhythm. -
Question 17 of 25
17. Question
The SA node is located in the
Correct
➤ SA node is present in the right atrium.
➤ It generates electrical impulses for heart contraction.Incorrect
➤ SA node is present in the right atrium.
➤ It generates electrical impulses for heart contraction. -
Question 18 of 25
18. Question
Normal blood pressure in a healthy adult is
Correct
➤ Normal blood pressure is 120/80 mmHg.
➤ 120 = systolic, 80 = diastolic pressure.Incorrect
➤ Normal blood pressure is 120/80 mmHg.
➤ 120 = systolic, 80 = diastolic pressure. -
Question 19 of 25
19. Question
The systolic pressure represents
Correct
➤ Systolic pressure occurs during ventricular contraction.
➤ It represents the maximum pressure in arteries.Incorrect
➤ Systolic pressure occurs during ventricular contraction.
➤ It represents the maximum pressure in arteries. -
Question 20 of 25
20. Question
The diastolic pressure represents
Correct
➤ Diastolic pressure occurs during ventricular relaxation.
➤ It is the minimum pressure in arteries.Incorrect
➤ Diastolic pressure occurs during ventricular relaxation.
➤ It is the minimum pressure in arteries. -
Question 21 of 25
21. Question
The normal pulse rate of an adult is approximately
Correct
➤ Normal pulse rate ranges from 60 to 100 beats per minute.
➤ It indicates the heartbeat rate.Incorrect
➤ Normal pulse rate ranges from 60 to 100 beats per minute.
➤ It indicates the heartbeat rate. -
Question 22 of 25
22. Question
Blood is a type of
Correct
➤ Blood is a fluid connective tissue.
➤ It transports oxygen, nutrients and wastes.Incorrect
➤ Blood is a fluid connective tissue.
➤ It transports oxygen, nutrients and wastes. -
Question 23 of 25
23. Question
The liquid portion of blood is called
Correct
➤ Plasma is the liquid part of blood.
➤ It transports cells, nutrients, hormones and wastes.Incorrect
➤ Plasma is the liquid part of blood.
➤ It transports cells, nutrients, hormones and wastes. -
Question 24 of 25
24. Question
Plasma constitutes about
Correct
➤ Plasma makes up about 55% of blood volume.
➤ It is mostly composed of water (90–92%).Incorrect
➤ Plasma makes up about 55% of blood volume.
➤ It is mostly composed of water (90–92%). -
Question 25 of 25
25. Question
The major component of plasma is
Correct
➤ Plasma contains about 90–92% water.
➤ Water acts as a medium for transport of substances.Incorrect
➤ Plasma contains about 90–92% water.
➤ Water acts as a medium for transport of substances.