Question

antidiuretic hormone (known as adh or vasopressin)...
multiple choice
increases water retention from renal tubules
acts on the hypothalamus to decrease appetite
causes vasodilation
causes smooth muscle contraction in the female reproductive tract

Explanation:

Antidiuretic hormone (ADH), also known as vasopressin, acts on the kidneys, specifically on the renal tubules. Its main function is to increase water re - absorption (retention) from the renal tubules back into the bloodstream. This helps in reducing urine volume and concentrating the urine.

• The hypothalamus is the site of ADH production, not its target for appetite - related actions.
• ADH causes vasoconstriction (narrowing of blood vessels) at high concentrations, not vasodilation.
• Oxytocin is the hormone that causes smooth muscle contraction in the female reproductive tract (e.g., during childbirth and lactation), not ADH.

Answer:

Increases water retention from renal tubules