FREE AND STUDY GAMES ABOUT ANATOMY CH. 12.1 EXAM

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FREE AND STUDY GAMES ABOUT ANATOMY CH. 12.1 EXAM

QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -56 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: A nerve has three successive connective tissue wrappings:

Answer:

epineurium, perineurium, and endoneurium

Question 2: Flattened cell wrapped around a portion of an axon in the PNS.

Answer:

neurolemmocyte Question 3: Defends against infectious agents and engulfs debris from dead or dying neurons.Phagocytic.

Answer:

microglia cell

Question 4: Which glial cells are found in CNS?

Answer:

astrocyte, ependymal, microglia, oligodendrocyte

Question 5: __ between a presynaptic and postsynaptic neuron occurs when __ molecules stored in synaptic vesicles are released from the synaptic knob of a presynaptic neuron into the synaptic cleft.

Answer:

transmission, neurotransmitter Question 6: The delay is the time between the neurotransmitter release from the presynaptic cell, its diffusion across the synaptic cleft, and neurotransmitter binding to receptors in the postsynaptic plasma membrane. Usually 0.3 to 0.5 milliseconds.

Answer:

synaptic delay Question 7: the periphery of the neurolemmocyte contains the cytoplasm and nucleus and is called the __.

Answer:

neurilemma Question 8: List the glial cells in the CNS and describe their major function:

Answer:

astrocyte (BBB), microglia cell (phagocytic), ependymal (CSF), oligodendrocyte (myelinates) Question 9: The functional classification of nerves is based upon the functional type of neuron (__ neuron and __ neuron).

Answer:

sensory and motor Question 10: Unipolar neurons are also called __ b/c they start out as bipolar neurons during development, but their two processes fuse into a single process.

Answer:

pseudounipolar Question 11: __ nerves contain both sensory and motor neurons. Most named nerves are __ nerves.

Answer:

mixed

Question 12: Helps form BBB; regulates tissue fluid composition; provides structural support an organization to the CNS; assists with neuronal development; and replicates to occupy space of dying neurons.

Answer:

astrocytes Question 13: An __ in the CNS can myelinate a 1-millimeter portion of many axons at the same time and not just one.

Answer:

oligodendrocyte Question 14: The __ is a layer of dense irregular connective tissue that wraps fascicles which are bundles of axons. This supports blood vessels.

Answer:

perineurium

Question 15: PNS-one cell myelinates one small region of __ axon.

Answer:

one Question 16: Fascicle wrapping:

Answer:

perinuerium Question 17: Structural classification of nerves is based upon the CNS component from which the nerve extends: __ nerves extend from the brain and __ nerves extend from the spinal cord.

Answer:

cranial, spinal Question 18: Two nerve cell processes extend directly from the cell body; one dendrite and one axon. Location of these neurons is relatively limited in humans (retina of eye and olfactory mucosa in nasal cavity).

Answer:

bipolar neuron

Question 19: An individual axon in a myelinated neuron is surrounded by neurolemmocyte and then wrapped in the ___, a delicate layer of areolar connective tissue that separates and electrically insulates each axon. With this c.t. are capillaries that supply each axon.

Answer:

endoneurium

Question 20: List the parts of the peripheral nervous system.

Answer:

spinal nerves, cranial nerves, ganglia Question 21: Nerve wrapping:

Answer:

epineurium Question 22: Small cells in CNS with slender branches from cell body; least common type of glial cell.

Answer:

microglia cell Question 23: Single short cell process extends directly from cell and looks like a T as a result of the fusion of two processes into one long axon. One neuron process; sensory neurons.

Answer:

unipolar neurons Question 24: __ nerves contain primarily motor neurons that relay information FROM the CNS.

Answer:

motor Question 25: Most common type of neuron. Multiple nerve processes extend directly from the cell body; typically many dendrites and one axon. Motor neurons.

Answer:

multipolar neuron