Question

The internal clock of mammals appears to be located in the

A. suprachiasmatic nucleus.

B. pituitary gland.

C. choroid plexus.

D. pons.

E. brain stem.

Answer 1

The biological clock of mammals is located in the suprachiasmatic nucleus (SCN) in the hypothalamus. It receives information from light-sensitive neurons in the retina and regulates regular changes in behavior and body processes.

Step-by-step explanation:

The internal clock of mammals, also known as the biological clock, is located in the suprachiasmatic nucleus (SCN) in the hypothalamus.

This area of the brain receives information from light-sensitive neurons in the retina, allowing the internal clock to be synchronized with the external environment.

The SCN sends signals to the body, causing regular changes in behavior and body processes that repeat every 24 hours.