SLCC Anatomy- Nervous tissue
The nervous system consists of which two subdivisions? - Answer- central and peripheral
Clusters of neuron cell bodies located outside the CNS are called - Answer- ganglia
Which functional division of the nervous system includes the SNS and ANS? - Answer- motor...
SLCC Anatomy- Nervous tissue
The nervous system consists of which two subdivisions? - Answer- central and
peripheral
Clusters of neuron cell bodies located outside the CNS are called - Answer- ganglia
Which functional division of the nervous system includes the SNS and ANS? -
Answer- motor nervous system
Which effectors are innervated by visceral motor neurons? - Answer- neurons and
glial cells
In neurons, the abundant free and bound ribosomes are collectively called the
______, also known as Nissl bodies. - Answer- chromatophilic substance
The slightly expanded tips of telodendria are called - Answer- multipolar neurons
Efferent neurons transmit nerve impulses from the CNS to - Answer- Muscles or
glands
Collectively, all glial cells guide young migrating _____ during development. -
Answer- neurons
The word root glia, as in "glial cells," most nearly means - Answer- glue
What are the neuroglia only found of the central nervous system? - Answer-
ependymal cells and astrocytes
The largest and most abundant of the CNS glial cells, ____________ help form the
blood-brain barrier. - Answer- astrocytes
Which types of glial cells are found in the peripheral nervous system? - Answer-
neurolemmocytes and satellite cells
What is term describes the collection of lipids and proteins that may form a protective
coating around an axon? - Answer- myelin
Myelination affects nerve impulse conduction in which way? - Answer- allows
saltatory conduction from one neurofibril node to the next
Axon regeneration in the PNS involves ____________ in a process known as
Wallerian degeneration. - Answer- neurolemmocytes
Nerves are bundles of parallel axons in the PNS that have three successive
connective tissue wrappings, called the - Answer- endoneurium, perineurium, and
epineurium
, The point at which two excitable cells contact to exchange information is called a -
Answer- synapse
At a chemical synapse, the presynaptic membrane releases a signaling molecule
called a - Answer- neurotransmitter
The rate of conduction of a nerve impulse is influenced by the diameter of the ___
and presence or absence of a - Answer- axon; myelin sheath
What accounts for the gray color of gray matter? - Answer- presence of Nissl bodies
and the absence of myelin
Bundles of neurofilaments extending into dendrites and axons to provide structural
support are called - Answer- neurofibrils
The phrase "terminally differentiated," as applied to mature neurons, means that they
cannot - Answer- divide mitotically to produce daughter cells
Although they outnumber ______ by as much as ten to one, _____ account for only
about half of the total volume of the nervous system. - Answer- neurons; glial cells
The ____ in the CNS and _____ in the PNS perform similar functions, although their
methods are different. - Answer- oligodendrocytes; neurolemmocytes
Which glial cells wander through the CNS and replicate in response to an infection,
much like leukocytes? - Answer- microglia
Although classified as glial cells, ______ are also ____ that line the cavities in the
brain and spinal cord and help form the choroid plexus. - Answer- ependymal cells;
epithelial cells
In the PNS, an axon may be enveloped by ______ without being ______. - Answer-
neurolemmocytes; myelinated
Which glial cells participate in the repair of damaged nerves? - Answer-
neurolemmocytes
Which nervous system divisions or components contain no afferent neurons? -
Answer- ANS and SNS of the motor nervous system
Ironically, a _____ neuron typically has more dendrites than a _____ neuron. -
Answer- unipolar; bipolar
A multipolar neuron that synapses on a gland cell is functionally classified as -
Answer- a visceral motor neuron
A nerve impulse involves changes in _______ and a movement of ______ across a
neuron's plasma membrane. - Answer- voltage; ions
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