We usually feel sleep at a definite time during night and in the morning at a definite time got up. Why does this happen? (page 58)
Answers
Answer:
This happens because our body rests for a certain amount of time until we regain all the energy we need.
It has been observed that we sleep during a definite time in the night and wake up during a particular time in the night. The Hypothalamus is a structure containing a cluster of nerve cells. They regulate sleep in a person's body.
The suprachiasmatic nucleus within the Hypothalamus receives information about the exposure of light directly from the eyes. The brain stem contacts the Hypothalamus in regulating the transition between sleeping and waking.
The pineal gland, positioned inside the brain's two hemispheres, gets signals from the suprachiasmatic nucleus. It then rises the production of the hormone melatonin, which aids put you to sleep once the lights go down.
People unable to see are often confused between the night and day. They therefore take melatonin to have a proper sleeping pattern.