heart rate control

What is the primary function of the baroreflex?

• To regulate body temperature.

• To maintain stable blood pressure levels.

• To control breathing rate.

• To manage blood glucose.

Where are the baroreceptors, which are specialized neurons that sense blood pressure changes, primarily located?

• In the brainstem and spinal cord.

• In the walls of the aortic arch and carotid sinus.

• Within the heart chambers.

• In the kidneys and adrenal glands.

When blood pressure is elevated, how does the baroreflex primarily act to lower it?

• By activating the sympathetic system and inhibiting the parasympathetic system.

• By inhibiting both the sympathetic and parasympathetic systems.

• By activating the parasympathetic system and inhibiting the sympathetic system.

• By directly releasing norepinephrine into the bloodstream.

What is the effect of sympathetic system activation during a sudden drop in blood pressure?

• Decreased heart rate and vasodilation.

• Increased heart rate, increased stroke volume, and vasoconstriction.

• Increased heart rate and vasodilation.

• Decreased heart rate and vasoconstriction.

baroreceptors are located in

• carotid sinus (neck)

• aortic arch

• atria, ventricles

• all of them