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Nervous System . A.P. Biology. Nervous System Fxns. Sensory input (Stimulus sent via Afferent fibers) Integration Motor output (Response sent via Efferent fibers). Functions: •    Sensory input – internal and external stimuli •    Integration – interpretation of sensory input

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nervous system

Nervous System

A.P. Biology

nervous system fxns
Nervous System Fxns
  • Sensory input (Stimulus sent via Afferent fibers)
  • Integration
  • Motor output (Response sent via Efferent fibers)
slide3

Functions:

•    Sensory input – internal and external stimuli

•    Integration – interpretation of sensory input

•    Motor output – response

slide7

Neurons

Structural units of the nervous system

Composed of a body, axon, and dendrites

Long-lived, a-mitotic, and have a high metabolic rate

Their plasma membrane functions in electrical signaling

nuclei vs ganglia
Nuclei vs ganglia
  • Clusters of cell bodies in the CNS are called nuclei
  • Clusters of cell bodies in the PNS are called ganglia
slide14

K+

Na+

Ca++

Cl-

scwann cells
Scwann cells
  • Form myelin sheath of PNS
white matter vs gray matter
White matter vs gray matter
  • White matter is myelinated
  • Gray matter is unmyelinated
  • Dendrites are always unmyelinated