4 Responses Cardiovascular System

What is the term for the increase in heart rate that occurs just before the start of exercise?

• Recovery heart rate

• Resting heart rate

• Anticipatory increase

• Maximum heart rate

What does the abbreviation 'SV' stand for in cardiovascular physiology?

• Stroke volume

• Systolic value

• Standard volume

• Systolic velocity

According to Starling’s Law, what happens to stroke volume when venous return increases?

• Stroke volume decreases

• Stroke volume remains the same

• Stroke volume increases

• Stroke volume is unaffected

During aerobic exercise, what typically happens to systolic blood pressure?

• It decreases

• It remains unchanged

• It increases

• It fluctuates randomly

Which of the following best describes the cardiac cycle?

• The process of blood clotting

• The sequence of events in one heartbeat

• The movement of air in and out of the lungs

• The breakdown of glucose

What is the main effect of vasodilation during exercise?

• Decreased blood flow to muscles

• Increased blood pressure

• Decreased heart rate

• Increased blood flow to muscles

What is the primary cause of increased acidity (lower pH) in the blood during intense exercise?

• Increased carbon dioxide levels

• Increased oxygen levels

• Decreased lactic acid

• Decreased carbon dioxide levels

• The difference in blood pressure between arteries and veins

• The difference in oxygen content between arterial and venous blood

• The difference in carbon dioxide content between arteries and veins

• The difference in pH between arterial and venous blood

What happens to the rate of diffusion of oxygen from the blood to the muscles during exercise?

• It decreases

• It remains the same

• It increases

• It stops completely