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Depolarization during an action potential occurs because of the:
A. Outward flow of sodium
B. Inward flow of potassium
C. Inward flow of sodium
D. Outward flow of chloride
Repolarization during an action potential occurs because of the:
A. Inward flow of sodium
B. Outward flow of potassium
C. Inward flow of calcium
D. Outward flow of sodium
During a synapse, an influx of which ion in the terminal bouton
causes vesicles to release neurotransmitters?
,A. Sodium
B. Potassium
C. Calcium
D. Chloride
What moves and binds to the cell membrane during synaptic
transmission to release neurotransmitters?
A. Synaptic vesicles
B. Microtubules
C. Ion channels
D. Dendrites
Action potentials are initiated in the:
A. Dendrites
B. Soma
C. Axon hillock
D. Terminal boutons
The two major types of nervous system cells are:
A. Neurons and glial cells
B. Dendrites and axons
C. Nerves and muscles
D. Axons and astrocytes
, Which cell type is responsible for signaling and communication?
A. Glial cell
B. Neuron
C. Microglia
D. Astrocyte
The central nervous system is composed of the:
A. Brain and spinal cord
B. Brain and nerves
C. Spinal cord and muscles
D. Brain and ganglia
The function of microglia is to:
A. Transmit impulses
B. Form myelin
C. Consume harmful substances
D. Produce neurotransmitters
The glial cell that helps form the blood-brain barrier is the:
A. Astrocyte
B. Schwann cell
C. Oligodendrocyte
D. Microglia
, 1 The glial cell that forms myelin in the central nervous system is
the:
A. Schwann cell
B. Oligodendrocyte
C. Astrocyte
D. Ependymal cell
1 The glial cell that forms myelin in the peripheral nervous system
is the:
A. Oligodendrocyte
B. Schwann cell
C. Astrocyte
D. Microglia
1 The posterior portion of the spinal cord is known as the:
A. Ventral side
B. Dorsal side
C. Caudal side
D. Lateral side
1 The anterior portion of the spinal cord is known as the:
A. Dorsal
B. Ventral