Question

True or false?

1. When the afferent arteriole detects a lower blood pressure, the juxtaglomerular apparratus will increase the secretion of Renin into the blood.

2. When volume receptor from the walls of the atria detects a drop in blood volume, it does not trigger
the cardiac atrial cells to secrete Atrial Natriuretic Peptide, but detection of lower blood pressure by
the afferent arteriole will trigger the juxtaglomerular apparatus to increase the secretion of Renin.

Answer 1

http://en.wikipedia.org/wiki/Juxtaglomerular_apparatus
this can help you and 1 is true

Answer 2

http://en.wikipedia.org/wiki/Baroreceptor
this can help you with 2

Answer 3

So 2 is false? @asmagul

Answer 4

(Atrial volume receptors are low pressure baroreceptors that are found in the atria of the heart.)

When these receptors detect a pressure drop in the atria, which indicates a decrease in blood volume, a signal is transmitted from the receptors to the hypothalamus in the brain. The hypothalamus, in turn, increases the production of vasopressin (ADH, AVP, or arginine vasopressin).
Furthermore, a low volume also stimulates sympathetic nerves, which stimulate renin release from the juxtaglomerular cells of the afferent arteriole in the kidneys.
(Renin leads to the activation of angiotensin II, a potent agent in increasing blood pressure.)

Answer 5

Your answers are in that paragraph..Read that carefully..

Answer 6

@ryaan it doesn't mention ANP so it is false right?

Answer 7

Yes 2nd is false..