Question

How does the body respond to changes in BV/BP? (think about what senses these changes, and what is used to effect a change, as well as what that final change is)(if BV/BP is too high or too low)

Answer 1

when blood pressure is high

the increased blood pressure is sensed by baroreceptor present at carotis sinus and aortic wall. These baroreceptors generate impulses via 9th and 10th cranial nerve. This stimulate Nucleus of tractus solitarius.

Nucleus of tractus solitarius cause inhibition of vasoconstrictor area and stimulation of vasodilator area. Both these changes cause dilatation of blood vessels, bradycardia and reduction in cardiac output which eventually bring blood pressure/volume to normal.

when blood pressure is low

The opposite of the above mentioned procedure takes place. Stimuli from baroreceptors cause vasoconstriction and increase heart rate which increases blood pressure.