Circulatory System Quiz 533 (20 MCQs)

Quiz Instructions

Select an option to see the correct answer instantly.

1. It's a blood vessel in the RUNNING UNDER THE EARS.

Correct Answer: C) Carotid artery.

2. A full cardiac cycle lasts

Correct Answer: D) 0.8 sec.

3. Veins carry carbon dioxide back to the heart.

Correct Answer: B) True.

4. What metal ion is at the center of each heme group in hemoglobin, which binds to oxygen?

Correct Answer: A) Iron (Fe).

5. Bicuspid valves are found on which side of the heart?

Correct Answer: B) Left.

6. This is where the gas exchange between the blood and the tissues takes place.

Correct Answer: A) Capillaries.

7. An EKG is actually

Correct Answer: D) A graph.

8. It is a fibrous, non-globular protein involved in the clotting of blood which forms a hemostatic plug or clot over a wound site.

Correct Answer: A) Fibrin.

9. Cells send wastes & carbon dioxide through the walls of these tiny blood vessels to get back in the bloodstream.

Correct Answer: B) Capillaries.

10. The receiving chambers of the heart are the

Correct Answer: A) Atria.

11. How many platelets are there in a pinhead sized drop of blood?

Correct Answer: C) 250 thousand.

12. Antibodies are special proteins produced by

Correct Answer: B) Lymphocytes.

13. Vena cava carries

Correct Answer: A) Deoxygenated blood from the lungs.

14. What part of the lymphatic system removes pathogens and dead cells from the lymph?

Correct Answer: C) Lymph nodes.

15. ..... causes plasmolysis

Correct Answer: B) Exosmosis.

16. The building blocks of proteins are

Correct Answer: B) Amino acids.

17. Pulse Wave is mainly caused by the

Correct Answer: C) Systole of left ventricle.

18. A vessel that carries blood to the heart

Correct Answer: A) Vein.

19. What is the double-walled sac around the heart?

Correct Answer: A) Pericardium.

20. Innermost coat or the wall of artery is called .....

Correct Answer: D) Endothelium.