The Structure in the Brain That Serves as an 'Internal

question 56

Multiple Choice

The structure in the brain that serves as an 'internal clock' for circadian rhythms is the

• A) periaqueductal grey.
• B) photo-optic ganglion.
• C) hypothalamus.
• D) pineal gland.
• E) suprachiasmatic nucleus.

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Definitions:

Model Airplane

A scaled-down replica of an actual aircraft, used for display, collection, or controlled flight.

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Biochemical substances produced by the body in response to stress, such as cortisol and adrenaline, which prepare the body to deal with stressors.

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The body's defense system against infectious organisms and other invaders, comprising various cells, tissues, and organs that work together.

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A deep, hearty laughter that originates from the belly, indicating amusement or joy.