Cardiopulmonary Baroreceptors Adaptation Quiz

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What is the main response of low-pressure baroreceptors to excessive venous return?

Increase in heart rate

Release of atrial natriuretic peptide (ANP) (correct)

Constriction of blood vessels

Decrease in volume excretion

What is the effect of a sudden increase in blood pressure on baroreceptors?

Decrease in heart rate

Stimulation of sympathetic nervous system (SNS)

Inhibition of parasympathetic nervous system (PNS) (correct)

Increase in blood pressure

How do the baroreceptors respond to a sudden decrease in blood pressure?

Hyperpolarization of cell (correct)

Stimulation of parasympathetic nervous system (PNS)

Enhanced stretching

Increase in heart rate

What is the role of atrial natriuretic peptide (ANP) released by low-pressure baroreceptors?

Decrease volume excretion Signup and view all the answers

How does receptor adaptation affect the rate of baroreceptor firing?

Results in decreased sensitivity Signup and view all the answers

What is the primary effect on heart rate when baroreceptors inhibit the parasympathetic nervous system (PNS)?

Decrease in heart rate Signup and view all the answers

What is the primary site of cardiovascular regulation in the brain?

Medulla Signup and view all the answers

What is the role of the Nucleus Ambiguus (NA) in the cardiovascular regulation process?

Contains cell bodies of the PNS Signup and view all the answers

What happens to baroreceptor firing response curve with a sustained increase in mean arterial pressure?

Shifts to the right Signup and view all the answers

Which brain region serves as the integrative region of the messages to regulate cardiovascular response?

Hypothalamus Signup and view all the answers

What effect does chronic hypertension have on baroreceptor firing?

Increases baroreceptor firing Signup and view all the answers

What is the role of the caudal ventrolateral medulla (CVLM) in cardiovascular regulation?

Projects inhibitory fibers to the SNS Signup and view all the answers

What is a characteristic of baroreceptor activation in terms of pressure?

Equally sensitive at carotid sinus and aortic arch in humans Signup and view all the answers

What is the effect of an elevated mean arterial pressure on the tendency for baroreceptors to decrease cardiac output and SVR?

Tendency disappears Signup and view all the answers

What happens to the baroreceptor firing response curve with a sustained decrease in mean arterial pressure?

Shifts to the left Signup and view all the answers

Which region of the brain modulates SNS outflow to cutaneous circulation during temperature regulation?

NTS Signup and view all the answers

What is the primary function of the baroreceptors in the short-term regulation of blood pressure?

To detect changes in blood pressure and initiate a reflex response Signup and view all the answers

What role does the hypothalamus play in temperature regulation?

Coordination of the body's thermoregulatory response Signup and view all the answers

What is peripheral resetting of the baroreceptor reflex, and what causes it?

An adaptation of the baroreceptors to maintain blood pressure within a new range Signup and view all the answers

What is receptor adaptation, and how does it affect the baroreceptor reflex?

A temporary adjustment of the baroreceptor's sensitivity to maintain a constant blood pressure Signup and view all the answers

What is the primary difference between the arterial baroreceptors and the cardiopulmonary baroreceptors?

Arterial baroreceptors respond to pressure changes in the arterial system, while cardiopulmonary baroreceptors respond to volume changes Signup and view all the answers