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HCS 212 TEST BANK 13 STUDY SET EXAM
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HCS 212 TEST BANK 13 STUDY SETEXAM
A biopsy of infected or injured tissue from the CNS will most likely show an elevated
number of
A) ependymal cells.
B) oligodendrocytes.
C) satellite cells.
D) microglia.
E) interneurons. - Answer d
A bundle of axons in the PNS is called a nerve. - Answer true
A bundle of axons within the CNS that shares a common origin, destination, and function
is called a tract. - Answer true
A communicating junction acts to facilitate
A) the passage of neurotransmitters between cells.
B) growth of Schwann cells.
C) a change in the permeability of the postsynaptic membrane.
D) the passage of ions between the cells.
E) All of the answers are correct. - Answer d
A connection between the brain and other organs in the body is called a pathway. -
Answer true
A group of axons in a specific region of the spinal cord is called a column. - Answer true
A group of cell bodies within the PNS is called a nucleus. - Answer false
A group of neuron cell bodies in the CNS that has a descrete boundary is called a
A) soma.
B) ganglion.
C) nucleus.
D) column.
,E) center. - Answer c
A nerve impulse triggers events at a synapse or junction that
A) usually connect the cell bodies of two neurons directly.
B) transfer information either to another neuron or to an effector cell.
C) continue to respond only if it is myelinated.
D) are always inhibitory unless followed by similar impulses.
E) None of the answers are correct. - Answer b
A neuromuscular synapse is a type of ________ synapse in which a neuron
communicates with a muscle fiber instead of another neuron. - Answer vesicular
A neuron classified on the basis that it delivers information to the CNS is a motor
neuron. - Answer false
A neuron might be temporarily unable to transmit an impulse to another if
A) its supply of neurotransmitters is exhausted.
B) the neurons are of different types.
C) the levels of microglia are too low.
D) there are too many astrocytes present.
E) you are asleep. - Answer a
A neuron pool is
A) a group of identical nerve cells.
B) a group of neurons linked by communicating junctions.
C) a group of interconnected neurons with specific functions.
D) the group of neurons available to regenerate a damaged nerve.
E) a group of neurons linked by electrical synapses. - Answer c
A neuron with one axon and one dendrite, with the soma between them is a
pseudounipolar neuron. - Answer false
A neuron with several dendrites but a single axon, which may have many branches is a
multipolar neuron. - Answer true
A neuron with the dendrite continuous with the axon, and the cell body off to the side is a
bipolar neuron. - Answer false
, A small neuron with processes that cannot be distinguished from axon to dendrite is
called an anaxonic neuron. - Answer true
A somatic motor neuron controls skeletal muscle. - Answer true
A somatic motor neuron controls smooth and cardiac muscles. - Answer false
A type of information processing wherein neuronal pools function in sequence, with one
pool activating a second, the second activating a third, etc., is called ________. - Answer
serial processing
Action potentials result from
A) closing of ion channels.
B) abrupt changing of the transmembrane potential.
C) opening of calcium gates.
D) neurons transporting neurotransmitters.
E) All of the answers are correct. - Answer b
An inhibitory response
A) makes an action potential more likely.
B) makes an action potential less likely.
C) directly causes an action potential.
D) causes ACh release.
E) None of the answers are correct. - Answer b
Areas of a myelinated axon that are not covered by myelin are called
A) internodes.
B) nodes.
C) gray matter.
D) white matter.
E) All of the answers are correct. - Answer b
Areas of gray matter in the interior of the CNS form larger groups called
A) spinal nerves.
B) nuclei.
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