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A&P5

KEYWORDS

QuestionAnswer
neuron: a cell in neural tissue that is specialized for intercellular communication through changes in membrane potential and synaptic connections
reflex: automatic reaction to a stimulus
nerve impulse: a self-propagating wave of depolarization; also called an action potential
summation: the accumulation of effects, especially those of muscular, sensory, or mental stimuli
plexus: a network of interlacing nerves, blood vessels, or lymphatics
autonomic nervous system: the division of the nervous system that functions involuntarily; innervates cardiac muscle, smooth muscle, and glands
motor nervous system: carries impulses from the central nervous system to effector organs muscles and glands
somatic nervous system: a division of the peripheral nervous system; also called the voluntary nervous system
acetylcholine: a chemical transmitter substance released by certain nerve endings
afferent: carrying to or toward a center
axon: neuron process that carries impulses away from the nerve cell body; efferent process; the conducting portion of a nerve cell
central nervous system: the brain and the spinal cord
conductivity: ability to transmit an electrical impulse
dendrites: the branching extension of neurons that carry electrical signals to the cell body; the receptive portion of a nerve cell
depolarization: the loss of a state of polarity; the loss of a negative charge inside the plasma membrane
intersegmental reflex: a reflex that involves several segments of the spinal cord
limbic system: the group of nuclei and centers in the cerebrum and diencephalon that are involved with emotional states, memories, and behavioral drives
membrane potential: (transmembrane potential) the potential difference, measured across a cell membrane and expressed in millivolts that results from the uneven distribution of positive and negative ions across the cell membrane
peripheral nervous system (PNS): a system of nerves that connects the outlying parts of the body with the central nervous system
synapse: the region of communication between neurons
Created by: ELENITA28
 

 



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