Short Term Control of Blood Pressure Flashcards
complete the equation MAP=COx…….
TPR
what happens if your mean arterial blood pressure is too low
fainting occurs
what happens if your MAP is too high
hypertension occurs
what type of receptors are baroreceptors
Baroreceptors are stretch receptors and respond to the pressure induced stretching of the blood vessel in which they are found
where do you find the baroreceptors
aortic arch
carotid sinus
if there is an increase in MAP what will happen to the baroreceptor firing rate
the firing rate will increase
what structure do the baroreceptors send signals to
the medulla oblongata
what nerve fires signals from the aortic arch to the medulla oblongata
vagus
what nerve fires signals from the carotid sinus to the medulla oblongata
the glossyl pharangeal
If there is a decrease in MAP what will happen to the baroreceptor firing rate
firing rate will decease
what are the other inputs to the medullary cardiovascular centers apart from the baroreceptors
central chemoreceptors
chemoreceptors in muscle
joint receptors
higher centers
what effect does vasopressin have on the collecting duct
increases the permeability of the collecting duct to water therefore more water is reabsorbed and plasma volume increases
what effect does ANP and BNP have on Na+ excretion
ANP and BNP promote Na excretion and therfore lower blood volume
