Human Physiology/The Nervous System
27
Myelin:
a fatty substance that surrounds and insulates the nerve fibers and facilitates the conduction of the nerve
impulse transmissions
Multiple Sclerosis (MS):
disease that affects the CNS by causing hardening and scaring of the myelin
Nodes of Ranvier:
unmyelinated gaps between sections of myelin
Peripheral Nervous System (PNS):
a way of communication from the central nervous system to the rest of the
body by nerve impulses that regulate the functions of the human body
Pons
control centers for respiration and inhibitory functions.
Postganglionic Cells:
have their cell bodies in the ganglia and send their axons to target organs or glands
Postsynaptic Cells
the cell on the receiving (second) end of the synapse.
Presynaptic Cell
The cell on the sending (first) end of the synapse.
Proprioception
the sense that indicates whether the body is moving with required effort, as well as where various
parts of the body are located in relation to each other.
Sensory Receptor:
structure that can find any kind of change in it's surroundings or environment
Somatic Nervous System (SNS):
the part of the peripheral nervous system associated with the voluntary control of
body movements through the action of skeletal muscles, and also reception of external stimuli
Synapses:
the gap between two neurons; new synapses lead to learning
References
Esther Wednesday, October 19, 2005
References
[1] http:/