Cardiovascular System Functions Quiz

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Which of the following is NOT a function of the cardiovascular system?

Transporting hormones and other molecules
Removing carbon dioxide and waste
Delivering oxygen and nutrients
Regulating immune function (correct)

Which part of the cardiac conduction system is responsible for initiating the contraction signal?

Atrioventricular (AV) node
Purkinje fibers
AV bundle (bundle of His)
Sinoatrial (SA) node (correct)

How does the parasympathetic nervous system affect heart rate?

Has no effect on heart rate
Increases heart rate above the intrinsic rate
Increases heart rate to the maximal possible rate
Decreases heart rate below the intrinsic rate (correct)

What is the main effect of the sympathetic nervous system on the heart?

Increases heart rate and contractility (B) Signup and view all the answers

Which part of the cardiac conduction system relays the electrical signal from the atrioventricular (AV) node to the ventricles?

AV bundle (bundle of His) (B) Signup and view all the answers

What is the intrinsic heart rate of the heart?

100 beats per minute (A) Signup and view all the answers

How does endurance training affect resting heart rate?

Decreases resting heart rate (D) Signup and view all the answers

Which part of the cardiac conduction system delays the electrical signal before it is relayed to the ventricles?

Atrioventricular (AV) node (B) Signup and view all the answers

Which branch of the autonomic nervous system increases heart rate and contractility?

Sympathetic nervous system (C) Signup and view all the answers

What is the main function of the Purkinje fibers in the cardiac conduction system?

Spreading the electrical signal throughout the ventricle walls (B) Signup and view all the answers

What is the main function of the sympathetic nervous system?

Increase heart rate (A) Signup and view all the answers

Which of the following is an intrinsic control mechanism of blood flow?

Myogenic mechanisms (C) Signup and view all the answers

During ventricular diastole, what happens to the ventricular pressure?

It drops (C) Signup and view all the answers

Which of the following is NOT a function of blood?

Production of hormones (B) Signup and view all the answers

What is the main role of baroreceptors in the body?

Regulate arterial pressure (C) Signup and view all the answers

Which of the following is true about ventricular fibrillation?

It compromises pumping capacity (A) Signup and view all the answers

What is the primary factor affecting resistance in blood flow?

Viscosity of blood (C) Signup and view all the answers

Which part of the cardiac cycle involves relaxation and filling of the heart chambers?

Ventricular diastole (B) Signup and view all the answers

What occurs during functional sympatholysis in muscle tissue?

Improved extraction at the tissue level (C) Signup and view all the answers

Which vessel carries blood away from the heart?

Artery (C) Signup and view all the answers