Question

Hormone responsible for normal sleep-wake cycle is

• A. Epinephrine
• B. Melatonin
• C. Insulin
• D. Gastrin

Answer 1

The correct option is B Melatonin

Epinephrine:

Secreted during emergency situations from the adrenal medulla, they break down glycogen (glycogenolysis), lipids (lipolysis) and proteins (proteolysis). They increase the strength of contraction of heart muscles, heart beat and rate of respiration. They also increase the preparedness of the body to act under emergency situations.

Gastrin :

Gastrin is a hormone secreted by the stomach which stimulates the secretion of gastric juice from the gastric glands.

Melatonin :

The hormone melatonin is secreted by the pineal gland and is also called the sleep hormone. Melatonin has the following functions:

• Regulation of the sleep-wakefulness cycle
• Influencing the following attributes:

○ Metabolism
○ Menstrual cycle
○ Pigmentation
○ Immunity/ defense capabilities

Insulin:

Insulin, a hypoglycemic hormone, secreted by the pancreas, stimulates glycogenesis and cellular glucose uptake thereby decreasing blood glucose levels.

Final answer:

c. Melatonin

Summary :

Melatonin The hormone melatonin is secreted by the pineal gland and is also called the sleep hormone. Melatonin has the following functions:

• Regulation of the sleep-wakefulness cycle
• Influencing the following attributes:

○ Metabolism
○ Menstrual cycle
○ Pigmentation
○ Immunity/ defense capabilities


Final answer:

c. Melatonin