Human Cardiovascular Physiology Quiz

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What is the normal range for diastolic blood pressure?

90-100 mm Hg

70-80 mm Hg (correct)

60-70 mm Hg

100-110 mm Hg

Which component of blood pressure does atherosclerosis affect?

Diastolic pressure

Systolic pressure

Venous pressure

Peripheral resistance (correct)

What is the role of 1-way valves in veins?

Prevent ventricular contraction

Increase venous pressure

Promote backflow of blood

Facilitate blood flow towards the heart (correct)

What causes blood to pool in veins during quiet standing?

Incompetent valves Signup and view all the answers

What does the top number in a blood pressure reading represent?

Systolic pressure Signup and view all the answers

How does atherosclerosis impact blood flow in arteries?

Increases back pressure Signup and view all the answers

Which of the following receives sensory information from baroreceptors in the aorta and carotid sinus?

Cardiac control center in the medulla Signup and view all the answers

If the right side of the heart pumped 1 ml more blood per beat, what could be the consequence within 90 minutes according to the text?

Accumulation of the entire blood volume in the lungs Signup and view all the answers

What primarily affects Stroke Volume according to the text?

Mean arteriole pressure Signup and view all the answers

In the context of blood vessels, what creates blood pressure?

Pressure gradient Signup and view all the answers

Which part of the autonomic nervous system innervates the SA and AV nodes with antagonistic controls?

Parasympathetic branch Signup and view all the answers

What monitors carbon dioxide and pH levels and influences heart rate based on their variations?

Chemoreceptors in the aorta Signup and view all the answers

Which part of the heart conducting system is responsible for initiating the stimulus that causes atria to contract?

SA Node Signup and view all the answers

What is the function of the AV Bundle (Bundle of His) in the heart conducting system?

Delivers impulse from AV Node to ventricles Signup and view all the answers

Which wave in an ECG represents the passage of current through the ventricles from the AV Node to Purkinje Fibers?

QRS wave Signup and view all the answers

What is the main function of Purkinje Fibers in the heart conducting system?

Deliver impulse to ventricles Signup and view all the answers

How does an ECG typically represent the electrical activity of the heart conducting system?

By showing characteristic waves Signup and view all the answers

Which part of the heart conducts impulses from the SA Node to the AV Node?

AV Node Signup and view all the answers

What is the primary role of the SA Node in the heart conducting system?

Generate electrical impulses rhythmically Signup and view all the answers