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all-or-non phenomenon - ANSWER-the action potential
either happens
completely or it doesn't
happen at all
peripheral nervous system (PNS) - ANSWER-subdivided into
two parts: the sensory or afferent division (carrying sensory
impulses to the CNS), and the motor or efferent division
(carrying impulses from the CNS to muscles and glands)
motor division of the PNS - ANSWER-subdivided into two main
parts: the somatic nervous system (also known as the
voluntary nervous system because it allows the human body
to consciously control its skeletal muscles), and the
autonomic nervous system (also known as the involuntary
nervous system because it regulates activities beyond
conscious control such as smooth muscles, cardiac muscles,
and glands)