PhysioQ - malvika

[ArchivalUser]

An increase in plasma Na+ concentrations with normal blood volumes causes which one of the following actions?
(A) Release of antidiuretic hormone from the posterior pituitary
(B) Release of aldosterone from the adrenal gland
© Release of renin from the juxtaglomerular cells
(D) Decrease in renal excretion of Na+

[ArchivalUser]

A...

[ArchivalUser]

A....

[ArchivalUser]

A-
An increase in osmolality, especially due to increased plasma Na+, excites osmoreceptors in the supraoptic nuclei of the hypothalamus. These nuclei release antidiuretic hormone that acts on distal renal tubular epithelium to conserve water while excreting Na+. A decrease in plasma Na+ has significant effects on other important hormonal and feedback systems for volume and osmolar regulation, including stimulation of aldosterone release and increased renin release from juxtaglomerular cells of the kidney

[ArchivalUser]

Everyone's right-its A.