Question

Epinephrine (adrenaline) is secreted by
(a) Adrenal Cortex
(b) Adrenal Medulla
(c) Pancreas
(d) Nerve endings

Answer 1

Hint: The inner part of an adrenal gland controls hormones that initiate the flight or fight response in us. The main hormones secreted by this include epinephrine (adrenaline) and norepinephrine (noradrenaline) , which have similar functions.

Complete step by step answer:
The adrenal medulla is the internal or inner part of the adrenal gland. Epinephrine is secreted by the adrenal medulla. Epinephrine is released during the stress of any kind of emergency situation and is therefore called an emergency hormone and the adrenal gland is called an emergency gland. It also prepares the body during the fright, fights hence also called 3F or fight, fights hormones.

Zone reticularis is the region of the adrenal cortex which is the innermost zone between the fasciculata and medulla. Zono reticularis secretes androgenic hormones which exhibit approximately the same effects as the male sex hormone testosterone. Androgen is generally referred to as male hormones that stimulate or control the development and maintenance of male characteristics like body hair growth and voice change.
- In females androgens have an important function in the production of E2 which is estradiol, another form of estrogen in the ovary and adipose tissue.
- Androgen in females is responsible for the development and maintenance of axillary and pubic hair.
- There are five types of androgens in females:
1) Androstenedione
2) Dehydroepiandrosterone
3) Testosterone
4) Di- hydro testosterone
5) 3 alpha androstanediol glucuronide
So, the correct answer is, 'adrenal medulla'.

Note: Epinephrine and norepinephrine are released by the medulla and nervous system respectively. During stress, much of the body's energy is employed to combat imminent danger. Epinephrine and norepinephrine are very similar to neurotransmitters and hormones. While epinephrine has slightly more of a control on your heart, norepinephrine has more of a control on your blood vessels. Both play an important role in your body's natural fight-or-flight response to stress and have important medical uses also.