DrWozniak Is Examining a Cell from the Nervous System of an Animal.He

question 53

Multiple Choice

Dr.Wozniak is examining a cell from the nervous system of an animal.He notices that at one end of the cell body is a long,fibrous strand of tissue.He immediately recognizes this as an axon that is responsible for ____.

• A) carrying signals away from the cell body
• B) receiving signals from other cells and carrying them toward the cell body
• C) determining the speed at which an action potential will travel
• D) determining whether the cell inhibits or excites neighboring neurons

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Definitions:

Circadian Rhythm

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

Adaptive Significance

Refers to the beneficial features of traits that have evolved through natural selection to solve specific problems in an organism's environment.

Constant Light (LL)

An environmental condition in which organisms are exposed to uninterrupted light, used in research to study circadian rhythms and biological clocks.

Circadian Rhythm

The built-in, roughly 24-hour cycle of physiological processes that organisms follow, including sleeping and feeding patterns, which responds to light and darkness in an organism's environment.