Instructions: Identify the Following

question 41

Essay

Instructions: Identify the following. Be as specific as possible, and include names, dates, and relevant facts as appropriate. Be sure to explain the significance of the person or term.
"Over There"

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Definitions:

Blood-Brain Barrier

A selective permeability barrier that protects the brain from foreign substances in the blood that may harm it.

Circadian Rhythms

Biological processes that display an endogenous, entrainable oscillation of about 24 hours.

Hypothalamus

A region of the brain responsible for the regulation of certain metabolic processes and other activities of the autonomic nervous system, including temperature control, hunger, and thirst.

Depressant

A substance that reduces arousal or stimulation in various parts of the brain, often used to treat anxiety or insomnia.