This image depicts key components involved in regulating your internal biological clock. What brain component corresponds with the letter B in this figure?

A) pineal gland
B) suprachiasmatic nucleus
C) optic nerve
D) amygdala.

Question

This image depicts key components involved in regulating your internal biological clock. What brain component corresponds with the letter B in this figure?

A) pineal gland 
B) suprachiasmatic nucleus 
C) optic nerve 
D) amygdala.

Quizplus · Accepted Answer

The suprachiasmatic nucleus (SCN) is a tiny region in the hypothalamus that is responsible for regulating the body's biological clock. It receives input directly from the eyes via the optic nerve and sends signals to other parts of the brain and body to synchronize circadian rhythms. The pineal gland, located in the brain, produces the hormone melatonin which can affect sleep cycle, but it is regulated by the SCN. The amygdala is involved in emotional processing and the optic nerve carries visual information from the eyes to the brain.

This Image Depicts Key Components Involved in Regulating Your Internal