Question

Can someone please explain to me in detail how to answer this problem?

Adrenal medulla responses occur more quickly than adrenal cortex responses because:

(A) adrenal medulla is controlled by positive feedback

(B) adrenal medulla is stimulated by nerves

(C) adrenal medulla is stimulated directly by neurosecretory cells

(D) adrenal medulla is controlled by negative feedback

(E) adrenal medulla is stimulated by tropic hormones in the blood

Answer 1

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Adrenal glands, also known as suprarenal glands.

• Adrenal glands produce hormones that help regulate your metabolism, immune system, blood pressure, response to stress and other essential functions.

• Adrenal glands are composed of two parts — the cortex and the medulla — which are each responsible for producing different hormones.

• The main hormones secreted by the adrenal medulla include epinephrine (adrenaline) and norepinephrine (noradrenaline), which have similar functions.

• The adrenal medulla is stimulated by nerves.

• Adrenal medullary response occur more quickly than adrenal cortex because :-

*

The adrenal cortex produces two main groups of corticosteroid hormones—glucocorticoids and mineralcorticoids. The release of glucocorticoids is triggered by the Hypothalamus and pituatory gland.Mineralcorticoids are mediated by signals triggered by the kidney.

When the hypothalamus produces corticotrophin-releasing hormone (CRH), it stimulates the pituitary gland to release adrenal corticotrophic hormone (ACTH). These hormones, in turn, alert the adrenal glands to produce corticosteroid hormones.

* Unlike the adrenal cortex, the hormones of the adrenal medulla are released after direct sympathetic stimulation of nerves, which occurs when you’re stressed. The adrenal medulla helps you deal with physical and emotional stress.

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