The circadian rhythm is influenced by light-sensitive retinal proteins that trigger signals to the

A) suprachiasmatic nucleus.
B) dopamine reward system.
C) thyroid gland.
D) sleep spindles.

Suprachiasmatic Nucleus

A tiny region in the brain's hypothalamus responsible for controlling circadian rhythms.

Retinal Proteins

Proteins located in the retina that play a crucial role in the conversion of light into visual signals.

Light-Sensitive

Having a sensitivity to light; often refers to materials or organisms that react to light in some significant way.