Question

The fight, flight, and fright hormone is
A. Glucagon
B. Insulin
C. Oxytocin
D. Adrenaline

Answer 1

Hormones are chemical messengers that stimulate the function of any organ. Hormones are directly released into the blood and this blood further carries them to organs of the body.

Complete answer:
For organs to exert function a signal is to be received by them which is carried by hormones. Hormones are secreted by endocrine glands like the Pituitary gland, Thymus, Thyroid, Pancreas, Ovaries, Testes, Pineal gland, and adrenal gland. Hormones are secreted at microscopic levels by these organs which leads to a major change in the function of the human body. There are three types of hormones Lipid derived-hormone, acid-derived hormone, and peptide hormone. Lipid-derived hormones include steroid hormones that are structurally similar to cholesterol, ex. Testosterone. Acid-derived hormones are adrenal hormones and are relatively small molecules, ex. Adrenaline. Peptide hormones include pituitary hormones and are proteins, e.g. Oxytocin.
The fight, flight, and fright response is a body’s in-built immediate response system designed to protect from danger. During this situation, response initiates in the brain at the amygdala i.e. the region of the brain responsible for perceiving fear. Amygdala stimulated hypothalamus that further stimulates the autonomic nervous system (ANS). ANS releases stress hormones adrenaline and cortisol.
Hence, the correct option will be option D- Adrenaline

Note: Adrenaline hormone is also produced by few nerve cells in the medulla oblongata. The fight-or-flight response can occur even due to anxiety or worrying which is a bad thing but this response is useful in some situations like while driving a car or running away from a dog.