Which of the Following Does Not Characterize the Suprachiasmatic Nuclei

question 199

Multiple Choice

Which of the following does not characterize the suprachiasmatic nuclei (SCN) of mammals?

• A) It is the master circadian clock.
• B) Its destruction results in arrhythmia.
• C) It consists of two clusters of neurons.
• D) Its underlying molecular mechanism involves positive feedback loops.
• E) It is located above the optic chiasm.

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Definitions:

Prefrontal Cortex

A region of the brain associated with decision making, personality expression, cognitive planning, and moderating social behavior.

Circadian Rhythm

The natural, internal process that regulates the sleep-wake cycle and repeats roughly every 24 hours.

Optic Nerve

The bundle of fibers that proceeds from each retina to the brain.

Sleep Cycles

The patterns of shifting through different stages of sleep, including REM (rapid eye movement) and non-REM stages, typically occurring multiple times throughout a sleep period.