Question

Where are the neurophysins cleaved from pro-hormones of ADH and oxytocin?

A) In the kidneys
B) In the liver
C) In the hypothalamus
D) In the adrenal gland

Answer 1

The correct answer to where the neurophysins are cleaved from pro-hormones of ADH and oxytocin is: C) In the hypothalamus.

Step-by-step explanation:

The neurophysins are cleaved from the pro-hormones of ADH (Anti-diuretic Hormone) and oxytocin in the hypothalamus.

These hormones are then transported down the axons of neurons to the posterior pituitary gland, where they are stored until released into the bloodstream. Neurophysins I and II act as carrier proteins facilitating the transport of oxytocin and vasopressin, respectively, from the hypothalamus to the posterior pituitary. It’s important to note that the posterior pituitary itself does not produce any hormones but is responsible for storing and releasing hormones produced in the hypothalamus.

Neurophysins are cleaved from the pro-hormones of ADH and oxytocin in the hypothalamus, after which they are transported and stored in the posterior pituitary gland until they are released into the bloodstream.