________ is secreted by pineal gland.

The correct answer is Melatonin

Key Points

• Melatonin is secreted by Pineal Gland.
  • It is involved in the regulation of biological rhythms of the body and sleep.
  • It is usually secreted in darkness hence also known as "Dracula of Hormones".
  • Sometimes it can be consumed from external sources by mouth to adjust the body's internal clock, as well as its external supplements.
• The pineal Gland is situated in the middle of the human brain and is the major site of the body's melatonin.

Important Points

• Progesterone hormone is released during the course of pregnancy hence also known as pregnancy hormone.
  • It inhibits the contraction of the uterus so that pregnancy can be sustained.
• Epinephrine also known as Adrenaline, is a hormone produced by adrenal glands and the small number of neurons in the medulla oblongata.
  • It relaxes muscles in the airways and tightens the blood vessels.
• ?Insulin is a hormone secreted by the pancreas.
  • It controls the amount of glucose in the bloodstream at any given moment.