EX 15 Review Sheet
Amyotrophic lateral sclerosis is a neurodegenerative disease in which motor neurons are progressively destroyed. Excess levels of the neurotransmitter glutamate have been implicated in this process. Which type of neuroglia would play a role in controlling glutamate levels in the chemical environment of neurons?
Astrocytes
Peripheral neuropathy has a variety of causes. Worldwide, the most common cause is leprosy, also known as Hansen's disease. Would you expect peripheral neuropathy to cause damage to tracts or to nerves? Why?
Nerves are damaged in the periphery as a result of a bacterial infection.
forms the myelin sheath in the PNS
Schwann cells
controls the chemical environment around neurons in the CNS
astrocytes
implies generator and transmitter
axon
region of the cell body from which the axon originates
axon hillock
secretes neurotransmitters
axon terminal
site of the nucleus and the most important metabolic area
cell body
receptive regions of a neuron (2 terms)
cell body, dendrite
essentially rough endoplasmic reticulum, important metabolically
chromatophilic substance
lines CSF-filled cavities
ependymal cells
act as a phagocyte in the CNS
microglia
insulate the nerve fibers
myelin sheath
forms the myelin sheath in the CNS
oligodendrocytes
surrounds the cell body of a neuron found in the PNS
satellite cells