The Cardiovascular system and exercise

What is the primary reason for increased cardiac output during exercise?

• Decreased venous return

• Increased heart rate and stroke volume

• Reduced oxygen demand

• Vasoconstriction in working muscles

What happens to blood flow distribution during exercise?

• Blood flow to the digestive system increases

• Blood flow to inactive muscles increases

• Blood flow to working muscles increases

• Blood flow to the brain decreases significantly

Which factor helps increase stroke volume during exercise?

• Increased parasympathetic activation

• Decreased venous return

• Enhanced contractility of the heart

• Reduced sympathetic stimulation

Which of the following best explains the role of baroreceptors during exercise?

• They increase blood flow to the skin to release heat

• They help maintain stable blood pressure despite increased heart rate

• They decrease venous return to the heart

• They increase adrenaline release to stimulate heart rate

What happens to systolic blood pressure during dynamic exercise like running?

• Decreases significantly

• Remains the same

• Increases with exercise intensity

• Drops below resting levels