Aclient undergoing an evaluation of hormone levels asks, "what regulates the hormone levels? "

A client undergoing an evaluation of their hormone levels asks "What regulates the hormone levels?" Which response by the nurse would be considered most accurate?

a) The hypothalamic-pituitary-target cell system

b) Exogenous forms of hormones  

c) The positive feedback loop

d) The hypophysial portal system

a) The hypothalamic-pituitary-target cell system

Explanation:

Hormone release in the body system are principally regulated via a negative feedback system. In the negative feedback system, a stimuli evoke the production of an hormone (for example lets say production of thyroid hormone from the signaling produced by anterior pituitary glands); now, once this hormone gets to a substantial certain level, a negative feedback is generated to the hypothalamic-pituitary-target cell system  and anterior pituitary to inhibit further signaling of hormonal production to the thyroid gland. This process thereby regulates the production of hormone levels.

the answer is yes, they are born/created, then they grow to their limit then produce offspring, then die.