Question

increased secretion of atrial natriuretic hormone results in
multiple choice
increased urine output.
increased thirst.
increased osmolality of the extracellular fluid.
increased blood pressure.
decreased urine output.

Explanation:

Atrial natriuretic hormone (ANH) is a hormone that promotes natriuresis (excretion of sodium) and diuresis (increased urine production). When ANH secretion increases, it acts on the kidneys to increase the glomerular filtration rate and inhibit sodium reabsorption. This leads to more water being excreted along with sodium, resulting in increased urine output.

• Increased thirst is mainly regulated by osmoreceptors detecting high osmolality (not directly by ANH).
• ANH actually decreases blood pressure (by promoting fluid loss, reducing blood volume).
• It decreases the osmolality of extracellular fluid (by promoting sodium and water excretion).
• And it does not decrease urine output.

Answer:

Increased urine output.