SensationTransduction of physical or chemical changes in the external or internal environment into nerve impulses by specialized receptors, transmission of these impulses by afferent neurons to the effectors, either directly or through the CNS.
EnvironmentThe external elements and conditions which surround, influence, and affect the life and development of an organism or population.
NeuronsThe basic cellular units of nervous tissue. Each neuron consists of a body, an axon, and dendrites. Their purpose is to receive, conduct, and transmit impulses in the NERVOUS SYSTEM.
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