Nervous Tissue Question Preview (ID: 44560)


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continuous is faster than saltatory nervous conduction
a) True
b) False
c)
d)

Ciliated CNS neuroglia that play an active role in moving the cerebrospinal fluid are:
a) Ependymal cells
b) Schwann cells
c) Microglia
d) Oligodendrocytes

This structure of the neuron carries impulses away from the cell body.
a) Dendrite
b) Hillock
c) Axon
d) Neurolemma

Schwann cells are found in the CNS.
a) True
b) False
c)
d)

A neuron that has its primary function of connecting other neurons is:
a) association neuron
b) efferent neuron
c) afferent neuron
d) glial cell

Of the characteristics listed, the factor most affecting the rate and speed of impulse conduction is:
a) length of the axon.
b) presence or absence of a myelin sheath (insulation).
c) number of neuroglia associated with it.
d) site of initial stimulation.

During the depolarization phase of an action potential, which of the following is the primary activity?
a) Potassium ions are flowing out of the cell.
b) Potassium ions are flowing into the cell.
c) Sodium ions are flowing out of the cell.
d) Sodium ions are flowing into the cell.

These ion channels respond primarily to neurotransmitters (chemicals).
a) Voltage.
b) Leakage.
c) Ligand.
d) All of these

The resting membrane potential of a neuron is __________ and the action potential “thresh-hold” is _______ .
a) –70, -55
b) –55, -70
c) –55, +30
d) None of these

The part of the nervous system that is voluntary and conduct impulses from the CNS to the skeletal muscles is the:
a) somatic nervous system
b) autonomic nervous system.
c) enteric nervous system.
d) sensory nervous system

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