WorksheetsCardiovascular System
Total questions: 14
Worksheet time: 7mins
The difference in oxygen content between arterial blood and venous blood is known as:
Oxygen saturation
Oxygen tension
Arteriovenous oxygen difference
Oxygen capacity
What is the action of muscles contracting to compress veins and push blood back toward the heart called?
Respiratory pump
Skeletal muscle pump
Pocket Valves
Gravity
The process of redistribution of blood during exercise involves:
increased blood flow to muscles and decreased flow to non-essential organs
decreased blood flow to muscles and increased flow to non-essential organs
equal distribution of blood to all body parts
no change in blood distribution
What is the volume of blood pumped from the heart in 1 minute called?
Cardiac output
Stroke volume
Heart rate
Blood pressure
What is the formula for cardiac output?
Cardiac output (Q) is calculated using the formula: Q = Stroke Volume (SV) x Heart Rate (HR).
Cardiac output (Q) is calculated using the formula: Q = Blood Pressure (BP) x Heart Rate (HR).
Cardiac output (Q) is calculated using the formula: Q = Stroke Volume (SV) / Heart Rate (HR).
Cardiac output (Q) is calculated using the formula: Q = Blood Pressure (BP) / Stroke Volume (SV).
What is blood pressure?
The force of blood against the walls of arteries
The amount of blood in the body
The rate at which the heart beats
The temperature of the blood
The role of the sympathetic pathway at the start of exercise is to:
increase heart rate and blood flow to muscles
decrease heart rate and blood flow to muscles
maintain current heart rate and blood flow
none of the above
Explain what happens to arteriovenous oxygen difference (A–VO2 diff) following the onset of exercise.
A–VO2 diff decreases due to increased oxygen delivery to muscles.
A–VO2 diff remains unchanged as exercise does not affect it.
A–VO2 diff increases due to greater oxygen extraction by muscles.
A–VO2 diff fluctuates randomly without a specific pattern.
Explain how redistribution of blood is achieved through exercise.
Through vasodilation and vasoconstriction of blood vessels
By increasing the heart rate only
By decreasing the blood pressure
Through the respiratory system
What physiological change occurs in the heart during intense exercise?
Decrease in heart rate
Increase in stroke volume
Decrease in stroke volume
Increase in blood pressure only
Which mechanism helps in the return of blood to the heart during exercise?
Vasodilation
Respiratory pump
Increased blood viscosity
Decreased heart rate
What is the primary reason for increased oxygen delivery to muscles during exercise?
Increased blood pressure
Increased cardiac output
Decreased stroke volume
Decreased heart rate
Which of the following changes occur in the blood vessels during exercise to enhance blood flow to active muscles?
No change in blood vessel diameter
Vasoconstriction of blood vessels in the brain
Vasodilation of blood vessels in active muscles
Vasoconstriction of blood vessels in active muscles
How does the heart rate change in response to the onset of exercise?
It increases to supply more oxygen to muscles
It remains unchanged
It fluctuates randomly
It decreases significantly
