Week 4.2 Nervous tissue Flashcards
What is an example of a low-molecular-weight molecule that bind to the voltage-gated sodium channels of the nerve cell membrane and inhibit the action potential that produces the nerve impulse
Local anesthetics
Sites where action potentials are transmitted from one neuron to another
Synapses
The possible effect(s) of a neurotransmitter on the postsynaptic membrane is to
Either depolarize or hyperpolarize, depending on the type of synapse.
The Central Nervous System (CNS) has the following type(s) of nerve fibers:
Both sensory and motor
The function of SSRIs is
Increase the amount of the neurotransmitter serotonin
The voltage difference between the exterior and interior of the cell, across the cell membrane is called the membrane potentialLinks to an external site.. In certain types of cells, the voltage fluctuations frequently take the form of a rapid upward spike followed by a rapid fall. This fluctuation is called the
Action potential
Nerve impulse
Depolarization wave
Cells that migrate and remove damaged synapses
Microglia
Function as part of the blood-drain barrier
Astrocytes
Cells that line the ventricles of the brain
Ependymal cells
Produce myelin sheathes in the PNS
Schwann cells
Cells whose processes are reinforced by glial fibrillary acid protein
Astrocytes
Cells that support or nourish the neurons of ganglia
Satellite cells
Facilitate movement of CSF
Ependymal cells
The most numerous type of glial cell in the brain
Astrocytes
Glial cells with myelin sheathes found in the CNS
Olingodendrocytes
