Question

A hormone responsible for normal sleep-wake cycle is?
A. Epinephrine
B. Gastrin
C. Melatonin
D. Insulin

Answer 1

Hint:
Epinephrine is the emergency hormone secreted from adrenal glands. Gastrin is released in the stomach to regulate HCL and gastric motility. Melatonin hormone secretion occurs through the pineal gland. It is well known for its sleep regulating functions in the body. Insulin regulates the blood sugar levels in the body.

 Complete step by step answer:
Hormones play a very important role in the proper functioning of our body. These are the chemicals which control and coordinate the body functions. Glands secrete various hormones. Two types of glands are present in the body: endocrine and exocrine gland. Endocrine glands are the ductless glands. Adrenal gland is located above the kidney. It produces adrenaline hormone which is also known as epinephrine. It is also called an emergency hormone. It also induces increased vascular smooth muscle contraction. It is used to treat very serious allergic reactions such as insect bite, foods, drugs, and other substances.
Gastrin is the hormone produced by the lining of the stomach and upper small intestine. Gastrin stimulates the release of gastric juices in the stomach. It also helps to stimulate gastric motility, gastric, mucosal growth and secretion of hydrochloric acid (HCL). Insulin hormone produced from the pancreas. It regulates the blood sugar levels in the body. Lack of Inulin in the body can cause diabetes. Melatonin is produced by pineal gland in the brain and then released into the bloodstream. Pineal glands start producing this hormone when it's dark while light can cause stop of the production. It helps to regulate circadian rhythm and synchronize our sleep-wake cycle with night and day. From the above information it is clear that Melatonin hormone is responsible for normal sleep-wake cycle.

Therefore, the correct answer is option C.

Note: Melatonin which is produced within the body is called endogenous melatonin; it can also produce externally called exogenous melatonin. Melatonin plays a very important role in getting quality sleep. It can be taken as supplements to address sleeping difficulties. It is used to adjust delayed sleep wake phase disorder (DSWPD), epilepsy and some neurodevelopmental disorders such as Autism Spectrum Disorder (ASD).