Practice Questions

19. Blood pressure is typically measured in which artery?

A. Carotid artery

B. Femoral artery

C. Brachial artery ✓

D. Radial artery

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18. What is the primary function of capillaries in the circulatory system?

A. Carry blood away from the heart

B. Carry blood towards the heart

C. Facilitate exchange of nutrients, gases, and wastes ✓

D. Regulate blood pressure

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17. The bicuspid valve is also known as the:

A. Aortic valve

B. Pulmonary valve

C. Mitral valve ✓

D. Tricuspid valve

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16. Which blood vessel carries deoxygenated blood from the right ventricle to the lungs?

A. Aorta

B. Pulmonary artery ✓

C. Pulmonary vein

D. Vena cava

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15. The SA node (sinoatrial node) is known as the heart’s natural pacemaker because it:

A. Relays impulses to the ventricles

B. Initiates the electrical impulse for contraction ✓

C. Regulates blood pressure

D. Filters blood

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Jun 6, 2026

14. What is the approximate pH range of normal human blood?

A. 6.5-6.9

B. 7.0-7.3

C. 7.35-7.45 ✓

D. 7.5-7.8

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Jun 6, 2026

13. Which of the following is the largest lymphatic organ in the body?

A. Thymus

B. Tonsil

C. Spleen ✓

D. Lymph node

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Jun 6, 2026

12. The universal blood recipient type is:

A. O negative

B. A positive

C. AB positive ✓

D. B negative

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11. Which blood component is primarily responsible for oxygen transport?

A. Platelets

B. Leukocytes

C. Erythrocytes ✓

D. Plasma

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Jun 6, 2026

10. The cells in the testes that produce testosterone are called:

A. Sertoli cells

B. Spermatogonia

C. Leydig cells (interstitial cells) ✓

D. Sustentacular cells

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Jun 6, 2026

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Practice Questions

19. Blood pressure is typically measured in which artery?

18. What is the primary function of capillaries in the circulatory system?

17. The bicuspid valve is also known as the:

16. Which blood vessel carries deoxygenated blood from the right ventricle to the lungs?

15. The SA node (sinoatrial node) is known as the heart’s natural pacemaker because it:

14. What is the approximate pH range of normal human blood?

13. Which of the following is the largest lymphatic organ in the body?

12. The universal blood recipient type is:

11. Which blood component is primarily responsible for oxygen transport?

10. The cells in the testes that produce testosterone are called:

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