1. What is the primary function of the cardiovascular system?
a) Gas exchange
b) Nutrient absorption
c) Transport of substances throughout the body
d) Waste elimination
Answer: c
2. Which chamber of the heart receives oxygenated blood from the lungs?
a) Right atrium
b) Right ventricle
c) Left atrium
d) Left ventricle1
Answer: c
3. What is the function of the sinoatrial (SA) node?
a) To pump blood out of the ventricles
b) To initiate the heart's electrical impulses
c) To receive blood from the veins
d) To regulate valve function
Answer: b
4. Which of the following describes the flow of blood through the pulmonary circulation?
a) Left ventricle -> aorta -> body -> right atrium
b) Right ventricle -> pulmonary arteries -> lungs -> left atrium
c) Left atrium -> mitral valve -> left ventricle -> aorta
d) Right atrium -> tricuspid valve -> right ventricle -> body
Answer: b
,5. What is the function of the atrioventricular (AV) valves?
a) To prevent backflow of blood from the arteries to the ventricles
b) To prevent backflow of blood from the ventricles to the atria
c) To initiate the heart's electrical impulses
d) To regulate blood pressure
Answer: b
6. Which of the following is the correct sequence of electrical conduction in the heart?
a) AV node -> SA node -> bundle branches -> Purkinje fibers
b) SA node -> AV node -> bundle branches -> Purkinje fibers
c) Purkinje fibers -> bundle branches -> AV node -> SA node
d) Bundle branches -> Purkinje fibers -> SA node -> AV node
Answer: b
7. What is the term for the contraction phase of the cardiac cycle?
a) Diastole
b) Systole
c) Repolarization
d) Depolarization
Answer: b
8. Which blood vessels carry oxygenated blood away from the heart?
a) Veins
b) Arteries
c) Capillaries
d) Venules
Answer: b
9. What is the function of capillaries?
, a) To carry blood away from the heart
b) To carry blood towards the heart
c) To facilitate exchange of gases and nutrients between blood and tissues
d) To regulate blood pressure
Answer: c
10. What is the primary component of blood plasma?
a) Red blood cells
b) White blood cells
c) Platelets
d) Water
Answer: d
11. Which protein is responsible for oxygen transport in red blood cells?
a) Albumin
b) Globulin
c) Hemoglobin
d) Fibrinogen
Answer: c
12. What is the function of platelets?
a) Oxygen transport
b) Immune response
c) Blood clotting
d) Nutrient transport
Answer: c
13. Which of the following is a function of white blood cells?
a) Blood clotting
, b) Oxygen transport
c) Immune response
d) Nutrient transport
Answer: c
14. What is cardiac output?
a) The volume of blood pumped by the heart per minute
b) The force of ventricular contraction
c) The heart rate
d) The blood pressure
Answer: a
15. What factors affect stroke volume?
a) Preload, afterload, contractility
b) Heart rate, blood pressure, conductivity
c) Conductivity, excitability, automaticity
d) resistance, vessel diameter, blood viscosity.
Answer: a
16. What is preload?
a) The pressure the ventricles must overcome to eject blood
b) The degree of stretch of the heart muscle before contraction
c) The force of ventricular contraction
d) The heart rate
Answer: b
17. What is afterload?
a) The degree of stretch of the heart muscle before contraction
b) The force of ventricular contraction
a) Gas exchange
b) Nutrient absorption
c) Transport of substances throughout the body
d) Waste elimination
Answer: c
2. Which chamber of the heart receives oxygenated blood from the lungs?
a) Right atrium
b) Right ventricle
c) Left atrium
d) Left ventricle1
Answer: c
3. What is the function of the sinoatrial (SA) node?
a) To pump blood out of the ventricles
b) To initiate the heart's electrical impulses
c) To receive blood from the veins
d) To regulate valve function
Answer: b
4. Which of the following describes the flow of blood through the pulmonary circulation?
a) Left ventricle -> aorta -> body -> right atrium
b) Right ventricle -> pulmonary arteries -> lungs -> left atrium
c) Left atrium -> mitral valve -> left ventricle -> aorta
d) Right atrium -> tricuspid valve -> right ventricle -> body
Answer: b
,5. What is the function of the atrioventricular (AV) valves?
a) To prevent backflow of blood from the arteries to the ventricles
b) To prevent backflow of blood from the ventricles to the atria
c) To initiate the heart's electrical impulses
d) To regulate blood pressure
Answer: b
6. Which of the following is the correct sequence of electrical conduction in the heart?
a) AV node -> SA node -> bundle branches -> Purkinje fibers
b) SA node -> AV node -> bundle branches -> Purkinje fibers
c) Purkinje fibers -> bundle branches -> AV node -> SA node
d) Bundle branches -> Purkinje fibers -> SA node -> AV node
Answer: b
7. What is the term for the contraction phase of the cardiac cycle?
a) Diastole
b) Systole
c) Repolarization
d) Depolarization
Answer: b
8. Which blood vessels carry oxygenated blood away from the heart?
a) Veins
b) Arteries
c) Capillaries
d) Venules
Answer: b
9. What is the function of capillaries?
, a) To carry blood away from the heart
b) To carry blood towards the heart
c) To facilitate exchange of gases and nutrients between blood and tissues
d) To regulate blood pressure
Answer: c
10. What is the primary component of blood plasma?
a) Red blood cells
b) White blood cells
c) Platelets
d) Water
Answer: d
11. Which protein is responsible for oxygen transport in red blood cells?
a) Albumin
b) Globulin
c) Hemoglobin
d) Fibrinogen
Answer: c
12. What is the function of platelets?
a) Oxygen transport
b) Immune response
c) Blood clotting
d) Nutrient transport
Answer: c
13. Which of the following is a function of white blood cells?
a) Blood clotting
, b) Oxygen transport
c) Immune response
d) Nutrient transport
Answer: c
14. What is cardiac output?
a) The volume of blood pumped by the heart per minute
b) The force of ventricular contraction
c) The heart rate
d) The blood pressure
Answer: a
15. What factors affect stroke volume?
a) Preload, afterload, contractility
b) Heart rate, blood pressure, conductivity
c) Conductivity, excitability, automaticity
d) resistance, vessel diameter, blood viscosity.
Answer: a
16. What is preload?
a) The pressure the ventricles must overcome to eject blood
b) The degree of stretch of the heart muscle before contraction
c) The force of ventricular contraction
d) The heart rate
Answer: b
17. What is afterload?
a) The degree of stretch of the heart muscle before contraction
b) The force of ventricular contraction
