Question

as an example of hormonal communication, when osmoreceptors of the detect dehydration, a signal to the posterior pituitary gland causes the release of .
multiple choice
hypothalamus: antidiuretic hormone (adh)
anterior pituitary: renin
anterior pituitary: antidiuretic hormone
hypothalamus: oxytocin

Explanation:

The hypothalamus produces antidiuretic hormone (ADH), which is stored and released by the posterior pituitary gland. When osmoreceptors detect dehydration, they signal the posterior pituitary to release ADH. ADH acts on the kidneys to increase water reabsorption, reducing urine output and conserving water. The other options are incorrect: Oxytocin is also produced by the hypothalamus and released by the posterior pituitary but is involved in childbirth and lactation, not dehydration response. Renin is produced by the kidneys, not the pituitary gland. The anterior pituitary has different functions and hormones (e.g., growth hormone, thyroid - stimulating hormone).

Answer:

Hypothalamus: Antidiuretic hormone (ADH)