HormRegReabs — KinFAST

Adaptive test — questions are selected based on your ability estimate. — Tag: ADHvsAldosterone

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A clinician compares the actions of antidiuretic hormone (ADH) and aldosterone, both of which act on the collecting duct. Which combination best contrasts these two hormones?

ADH increases sodium reabsorption while aldosterone increases water reabsorption Both hormones target the same transporter and produce identical effects on water and sodium reabsorption ADH (from posterior pituitary) inserts aquaporin-2 channels into the apical membrane of principal cells to increase water reabsorption, responding primarily to plasma osmolarity; aldosterone (from adrenal cortex) increases sodium reabsorption and potassium secretion by principal cells via the sodium-potassium pump, responding primarily to blood volume and angiotensin II Both hormones are released from the anterior pituitary in response to high plasma osmolarity

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