Question

the posterior pituitary gland secretes hormones synthesized in the
pancreas
hypothalamus
adrenal gland
thyroid gland
pineal gland

Explanation:

The posterior pituitary gland stores and secretes hormones (oxytocin and antidiuretic hormone) that are synthesized in the hypothalamus. The pancreas produces insulin and glucagon. The adrenal gland produces cortisol and aldosterone. The thyroid gland produces thyroxine. The pineal gland produces melatonin.

Answer:

hypothalamus