chap 9 Flashcards
(18 cards)
What major functioning cell type in the nervous system responds to stimuli and conducts impulses to other parts of the cell?
Neuron
What is the long fiber part of the neuron called?
Axon
What part of the neuron receives stimuli?
Dendrites
What cells support neurons but are not involved in conducting impulses?
Glial cells
On the neuron, what is on the opposite end of the dendrites?
Synaptic knobs or bulbs
What is the fatty sheath made of that covers the axons?
Myelin
What is the CNS composed of?
Brain and spinal cord
What are gaps in the myelin sheath known as?
Nodes of Ranvier
When axons are covered with the sheath, this is also known as _______?
White Matter
What is the PNS composed of?
The cranial nerves from the brain, and the spinal nerves from the spinal cord.
What nerves carry nerve impulses toward the CNS?
Afferent nerves
What nerves carry nerve impulses away from the CNS?
Efferent nerves
