Nervous system
Nervous systemNervous System
The two major subdivisions of the nervous system are the
central nervous system and the peripheral nervous system.
The CNS consists of the brain and the spinal cord, it's
responsible for integrating, processing, and coordinating
sensory data and motor commands. The CNS integrates balance
and limb position and coordinates your recovery by
commanding the appropriate skeletal muscles. The CNS is
also the seat of higher learning, performing functions as
intelligence, memory, learning, and emotion.
The PNS includes all the neural tissue outside the CNS. The
PNS carries motor commands to the peripheral tissues and
systems. Nerve fibers called axons carry sensory
information and motor commands in the PNS.
Sketch and label the structure of a typical neuron and
describe the function of each.
* The soma, consists of the cell body of a neuron
which further contains the nucleus.
* Glial cells interact with neurons and regulate the
extracellular environment, protect against
pathogens and repair damaged neural tissue.
* Axons are-capable of propagating nerve impulses.
* Dendrites respond to specific stimuli in the
extracellular environment.
* Synapse terminals communicate information from the
presynaptic cell to the posisynaptic cell.
Structural Classification
*Anaxonic neurons- have multiple processes and the axon is
indistinguishable from the
from the dendrites. They're fairly small.
*Bipolar neurons- have two processes in which one is a
dendrite, and the other an axon.
The dendrite is distinguishable from it's extensive
branching at it's distal end. it's less than 3Omm from tip
to tip.
*Unipolar neurons- have a continuous dendritic and axonal
process, in which case the cell body...
To view the complete essay, you be registered.