ADH is released by the anterior pituitary and functions to increase urine output.
True
False
The Correct Answer is B
B. False: Antidiuretic hormone is synthesized in the hypothalamus and released by the posterior pituitary gland. Its primary function is to decrease urine output by increasing water reabsorption in the renal collecting ducts. This process conserves systemic water and concentrates the final urine.
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Correct Answer is {"dropdown-group-1":"B"}
Explanation
Correct answer: B
Renal medulla: The renal medulla is the deepest (innermost) region of the kidney. It is composed of renal pyramids, which are cone-shaped structures containing loops of Henle and collecting ducts. These structures are essential for the countercurrent mechanism, which allows the kidney to concentrate urine by reabsorbing water and solutes. The medulla lies beneath the renal cortex and surrounds the renal pelvis, making it central to urine formation and concentration.
Correct Answer is B
Explanation
B. False: The insertion of aquaporin-2 channels into the apical membrane is strictly dependent on the presence of antidiuretic hormone. Without this hormonal signal, the channels are internalized into endosomes, making the membrane impermeable to water. This allows for the excretion of large volumes of dilute urine.
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