Cardiovascular Physiology Quiz

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Which factor is directly proportional to end-diastolic volume (EDV)?

Preload (correct)

Stroke volume

Contractility

End-systolic volume

Increased venous return leads to an increase in end-systolic volume (ESV).

False

What is the Frank-Starling Principle?

As end-diastolic volume increases, stroke volume increases.

The amount of blood that remains in the ventricle at the end of ventricular systole is known as _____ .

end-systolic volume (ESV) Signup and view all the answers

Match the following factors with their effect on stroke volume:

Preload = Increased ventricular stretching Contractility = Force produced during contraction Afterload = Resistance against ventricle ejection End-diastolic volume = Volume of blood in the ventricle before contraction Signup and view all the answers

What is the primary hormone responsible for increasing heart rate through sympathetic stimulation?

Norepinephrine Signup and view all the answers

The Bainbridge reflex directly adjusts heart rate in response to blood pressure changes.

False Signup and view all the answers

What effect does increased venous return have on heart rate?

Increases heart rate. Signup and view all the answers

The stroke volume (SV) is calculated using the formula SV = EDV - _____ .

ESV Signup and view all the answers

Match the following components with their respective effects on heart rate:

Norepinephrine = Increases heart rate Epinephrine = Increases heart rate Stretch receptors = Trigger increased heart rate Ventricular diastole = Affects filling time Signup and view all the answers

What happens to heart rate when the stretch receptors in the right atrium are activated?

Heart rate increases Signup and view all the answers

A faster heart rate contributes to a longer duration of ventricular diastole.

False Signup and view all the answers

What determines the filling time of the ventricles?

Heart rate. Signup and view all the answers

Which of the following factors increases stroke volume?

Increased venous return Signup and view all the answers

Increased afterload decreases stroke volume.

True Signup and view all the answers

What is the relationship between end-diastolic volume (EDV) and stroke volume (SV)?

Stroke volume (SV) is equal to end-diastolic volume (EDV) minus end-systolic volume (ESV). Signup and view all the answers

Cardiac output (CO) is calculated as heart rate (HR) times _____.

stroke volume (SV) Signup and view all the answers

Match the following terms with their definitions:

Preload = End-diastolic volume Afterload = Resistance to blood flow out of the ventricle Contractility = Ability of the heart muscle to contract Cardiac Reserve = Difference between resting and maximal cardiac outputs Signup and view all the answers

Which factors decrease stroke volume?

Increased ESV Signup and view all the answers

Adrenaline decreases heart rate and stroke volume.

False Signup and view all the answers

Name one factor that affects venous return.

Filling time or rate of blood flow through veins. Signup and view all the answers

Increased sympathetic stimulation results in _____ contractility.

increased Signup and view all the answers

Which hormone is NOT known to increase heart contractility?

Acetylcholine Signup and view all the answers

Cardiovascular Physiology Quiz

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Questions and Answers

Which factor is directly proportional to end-diastolic volume (EDV)?

Increased venous return leads to an increase in end-systolic volume (ESV).

What is the Frank-Starling Principle?

The amount of blood that remains in the ventricle at the end of ventricular systole is known as _____ .

Match the following factors with their effect on stroke volume:

What is the primary hormone responsible for increasing heart rate through sympathetic stimulation?

The Bainbridge reflex directly adjusts heart rate in response to blood pressure changes.

What effect does increased venous return have on heart rate?

The stroke volume (SV) is calculated using the formula SV = EDV - _____ .

Match the following components with their respective effects on heart rate:

What happens to heart rate when the stretch receptors in the right atrium are activated?

A faster heart rate contributes to a longer duration of ventricular diastole.

What determines the filling time of the ventricles?

Which of the following factors increases stroke volume?

Increased afterload decreases stroke volume.

What is the relationship between end-diastolic volume (EDV) and stroke volume (SV)?

Cardiac output (CO) is calculated as heart rate (HR) times _____.

Match the following terms with their definitions:

Which factors decrease stroke volume?

Adrenaline decreases heart rate and stroke volume.

Name one factor that affects venous return.

Increased sympathetic stimulation results in _____ contractility.

Which hormone is NOT known to increase heart contractility?

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