Q1. What is the lifespan of red blood cells (RBCs) in humans?A. 30 daysB. 60 daysC. 90 daysD. 120 days
Q2. Which component of blood is responsible for oxygen transport?A. PlasmaB. LeukocytesC. ErythrocytesD. Platelets
Q3. Which of the following statements about blood clotting is correct?A. Platelets do not play any role in clot formation.B. Prothrombin is converted into thrombin by calcium ions and clotting factors.C. Fibrinogen is an inactive form of thrombin.D. Blood clotting is an enzymatic process but does not require calcium ions.
Q4. Which part of the circulatory system directly supplies oxygenated blood to the heart muscle?A. Pulmonary circulationB. Systemic circulationC. Coronary circulationD. Hepatic portal circulation
Q5. Which hormone is released in response to low blood pressure and helps retain water?A. AdrenalineB. InsulinC. Antidiuretic hormone (ADH)D. Glucagon
Q6. Which of the following is the most abundant plasma protein?A. FibrinogenB. AlbuminC. GlobulinD. Prothrombin
Q7. Which of the following is incorrect about the function of veins?A. Veins carry blood toward the heart.B. Veins have thinner walls than arteries.C. Veins always carry deoxygenated blood.D. Veins contain valves to prevent backflow.
Q8. Which of the following statements about veins is correct?A. Veins have thicker walls than arteries.B. Veins carry blood under low pressure.C. Veins do not contain any valves.D. Veins always carry oxygenated blood.
Q9. Which of the following is correct about hemoglobin?A. Hemoglobin is present in WBCs.B. Hemoglobin binds with oxygen for transport.C. Hemoglobin does not contain iron.D. Hemoglobin plays no role in carbon dioxide transport.
Q10. Which of the following statements is correct regarding blood?A. Blood is a specialized epithelial tissue.B. Blood consists of plasma and formed elements.C. Blood transports only oxygen and no other substances.D. Blood does not contain proteins.