Question

Norepinephrine is secreted from
A. Zona glomerulosa
B. Zona fasciculata
C. Zona reticularis
D. Medulla of adrenal

Answer 1

Hint: Norepinephrine, also called noradrenaline or noradrenalin, is an organic chemical in the catecholamine race that serves in the brain and body as a hormone and neurotransmitter.

Complete Answer:
- Norepinephrine production is lower during sleep, increases during wakefulness, and reaches much higher levels during stress or danger situations in the so-called fight-or-flight response. Adrenaline and noradrenaline are also called epinephrine and norepinephrine.
- Both hormones are secreted from the adrenal gland medulla. They are often produced at the ends of sympathetic nerve fibres.
- Norepinephrine is a drug that is normally found in the body that functions as both a stress hormone and a neurotransmitter (a substance that sends messages between nerve cells) that is released into the blood as a stress hormone as the brain discovers when a stressful condition has arisen.

Thus, option D) is the correct choice ie., Medulla of adrenal.

Additional Information:
- Functionality of Norepinephrine is along with dopamine which inturn increases the pulse rhythm and blood supply from the heart. It also raises blood pressure and helps to break down fat and raise blood sugar to give the body more energy.
- Epinephrine and norepinephrine are somewhat close to neurotransmitters and hormones. Although epinephrine has a marginally higher effect on your muscle, norepinephrine has a higher effect on your blood vessels. They both play a part in the body's normal fight-or-flight reaction to stress and have significant medical applications as well.

Note: Norepinephrine is released into the blood as a stress hormone as the brain learns that a traumatic situation has occurred. The common side effects of Norepinephrine are headache, hypertension(High blood pressure), slow heart rate, shortness of breath, anxiety etc. The stress mechanism depends on two main hormones: adrenaline and cortisol. Adrenaline works in the short phase, while cortisol has a good momentum and works in the long phase.