Question

Epinephrine is secreted from
a. Adrenal medulla and decreases heart beat
b. Adrenal medulla and increases heart beat
c. Pancreas and increases heart beat
d. Pancreas and decreases heart beat

Answer 1

Hint: Adrenal gland is also called as a suprarenal gland, where it produces the number of hormones, and this gland is divided into two zones, namely the adrenal cortex and adrenal medulla, where adrenal cortex Is divided into three layers and produce different types of steroids, and other hormones.

Complete answer:
- Epinephrine is also called adrenaline, which is secreted by the adrenal medulla, and it also secretes the norepinephrine or noradrenaline, and they both together are called catecholamines, where they contain the catechol group and amine group.
- Among both hormones, the receptors for adrenaline are more compared to noradrenaline.
- Epinephrine or adrenaline is mainly released in the body during any stressful situations, or during any emergency conditions, so the epinephrine is also called a fright or flight hormone, and the adrenal gland is considered as an emergency gland.
- This hormone epinephrine has so many effects in the body, which includes that, it increases the heart rate, it also increases the strength of the contraction of the heart.
- In some situations, it increases the rate of respiration and causes sweating and also causes the piloerection, it also causes the dilation of the pupil.
- It also causes the breakdown of glycogen, which results in an increase in blood glucose levels.

Hence, the correct answer is option (B).

Note: Adrenaline is used in a wide range in the medical field, where it is used for allergies, cardiac arrest, and any superficial bleeding, it is also used for the treatment of asthma, if other treatments are not effective, it can be intravenously or into a muscle or for inhalation.