Biology Practice: Circulatory System (Mock Test 5 - Ultimate Comprehensive Mastery)
1. The only vein in the human body that carries oxygenated blood is the:
2. Which chamber of the heart receives deoxygenated blood from the entire body?
3. The process by which WBCs engulf and destroy bacteria is called:
4. The soluble protein of the blood plasma which is responsible for blood clotting is:
5. Which of the following blood vessels have the thinnest walls to facilitate exchange of materials?
6. The 'Lubb' sound of the heart is produced due to the closure of:
7. A person with blood group 'AB' is called a Universal Recipient because:
8. The phase of heart contraction is called ______ and the phase of relaxation is called ______.
9. Which organ acts as a reservoir of blood and is often known as the 'Graveyard of RBCs'?
10. The Hepatic Portal Vein carries blood from the ________ to the ________.
11. Which blood vessel has the smallest lumen and thickest muscular wall relative to its size?
12. The structural integrity of the heart valves is maintained by thread-like cords called:
13. The main function of Lymph is to:
14. What is the standard 'Normal Blood Pressure' for a healthy human adult?
15. The 'Pacemaker' of the heart, which initiates the heartbeat, is the:
16. Vitamin ________ is essential for the synthesis of prothrombin in the liver for blood clotting.
17. In 'Double Circulation', the Systemic circulation starts from the ________ and ends in the ________.
18. Mature mammalian Erythrocytes lack a nucleus primarily to:
19. Which blood group is known as the 'Universal Donor'?
20. The 'Bicuspid Valve' prevents the backflow of blood from the:
