Although Light Is the Strongest External Zeitgeber That Entrains Circadian

question 39

Multiple Choice

Although light is the strongest external zeitgeber that entrains circadian rhythms, the hormone ________, secreted by the pineal gland, acts as an internal zeitgeber.

• A) Vitamin D.
• B) Corticosterone.
• C) Melatonin.
• D) Gingko biloba.

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Definitions:

Anterior and Posterior Triangles

Regions of the neck divided by the sternocleidomastoid muscle into front (anterior) and back (posterior) areas.

Hydrocephalus

A condition characterized by an abnormal buildup of cerebrospinal fluid in the ventricles of the brain.

Cranium

The part of the skull that encloses the brain, consisting of the frontal, parietal, occipital, and temporal bones.

Setting Sun Eyes

A condition where the eyes appear to be driven downward, with the sclera visible above the iris, often indicative of certain neurological disorders.