Nervous System
This is a function of the nervous system that allows it to process, store information, and make decisions.
integration
Neurons contain all organelles except...
centrioles
True or False: Glial cells cannot divide
false
These cells create the myelin sheath in the CNS.
oligodendrocytes
The membrane is highly permeable to these two ions at rest.
Na+ and K+
This function of the nervous system sends information about the environment to the brain/spinal cord.
sensory
This is the site of an AP generation.
axon hillock
gliomas
These cells create the myelin sheath in the PNS.
Schwann cells
This ion has a greater impact on the resting membrane potential.
K+
This division takes sensory info toward the CNS.
afferent
This is a group of cell bodies in the CNS.
nucleus
These cells line the ventricles of the brain and spinal cord and produce CSF.
ependymal cells
In myelin, there is a ___:___ ratio between lipids and proteins.
80:20
The resting membrane potential is this many milivolts.
-70 mV
This division sends motor information to the PNS.
efferent
This is a bundle of axons in the CNS.
tract
These cells are the most abundant, form the BBB, and regulate nutrient/waste transfer.
astrocyte
This is the function of myelin.
In order to generate an action potential, cells need to reach this threshold value.
-55 mV
Neurons have three unique characteristics which are...
secretion; longevity; no mitosis
This is a group of cell bodies in the PNS.
ganglia
These cells act as macrophages, cleaning up debris and bacteria.
microglia
Multiple sclerosis means that myelin from ________________ is replaced with _________________. What is the result?
oligodendrocytes; scar tissue
nerve conduction speed decreased or blocked entirely
depolarization: Na+ inflow (more positive)
repolarization: K+ outflow (more negative)