MC QUESTION
"What factors stimulate renin release?"
Option: A decrease in plasma osmolarity
Although it is not part of the Renin-Angiotensin System, is it correct to say that a change in plasma osmolarity will eventually lead to renin release?
Yes, it is correct.
A decrease in plasma osmolarity leads to decreased blood volume and ultimately reduced blood pressure. A reduction in blood pressure is sensed by the kidney cells resulting into secretion of renin. Renin ultimately produces angiotensin II which increases ADH secretion to enhance the reabsorption in order to maintain the blood volume.
Actually a continuous exchange occurs between plasma and body tissues fluid in order to maintain the hydration of body tissues. A decrease in plasma osmolarity causes shifting of plasma fluid into the tissues resulting into decreased blood volume.
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