Definitions

Human Physiology

Lesson 42 : Central & Peripheral Nervous System

Definitions

Reflex action: is spontaneous or unconscious response of body to a stimulus.
Receptors
: are specialized cells that can transducer external stimulus into a nerveimpulse e.g.rods & cones of retina.
Sensory nerve
: is afferent nerve carrying nervous impulse from peripheral organ towards CNS e.g. optic nerve.
Motor nerve
: is efferent nerve carrying nervous impulse from CNS to peripheral organ e.g. occulomotor nerve.

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Last modified: Wednesday, 11 April 2012, 5:31 AM