Question

If dehydration was resolved, what would be a likely process to stop the production and signaling by ADH?

o The osmoreceptors of the hypothalamus would receive the message of hydration and no longer promote the production of ADH.
o Blood vessels would remain constricted while the body is hydrated to promote higher blood pressure.
o The kidneys would continue to slow the secretion of fluid.
o None of the above are correct.

Answer 1

ADH production is reduced when osmoreceptors in the hypothalamus detect a decrease in blood osmolarity due to rehydration, signaling the kidneys to excrete more dilute urine and maintaining water balance in the body.

Step-by-step explanation:

When dehydration is resolved, osmoreceptors in the hypothalamus detect the decreased osmolarity of the blood. This occurs because as the individual rehydrates, there is an increase in blood volume and a dilution of blood solutes. Consequently, these receptors signal to reduce the production and release of antidiuretic hormone (ADH). With lower levels of ADH, the kidneys are prompted to reduce water reabsorption—this results in more dilute urine being excreted, thereby avoiding an overconcentration of water in the blood. Furthermore, this process is part of a negative feedback mechanism to maintain homeostasis within the body.

The correct answer to the student's question would be the first option: the osmoreceptors of the hypothalamus would receive the message of hydration and no longer promote the production of ADH.