Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN:9781305389892
Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Chapter39: Information Flow And The Neuron
Section: Chapter Questions
Problem 1TYK
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Transcribed Image Text:Alzheimer's disease is associated with the deterioration of memory and mental capacity
due to decreased production of acetylcholine and loss of up to three-quarters of the neurons
in parts of the brain.
Which phase of impulse transmission would be lacking in a person with Alzheimer's
disease?
Select one:
Maintenance of resting potentials in neurons.
Excitation of postsynaptic neurons.
Active transport of spodium and potassium in
neurons.
Restoration of polarity in neurons.
O
O
O
O
Transcribed Image Text:Multiple sclerosis (MS) is a disorder that causes the destruction of myelin sheaths surrounding
neurons. People with MS display many symptoms, including slurred speech, double vision, and
poor muscle coordination.
What is the direct effect of MS on nerve impulse transmission?
Select one:
The movement of impulses along neurons is
slower than normal.
Dendrites cannot be stimulated by acetylcholine,
therefore impulses are not generated in neurons.
The threshold level of stimulation for neurons is
greater than normal.
Axons cannot sectete acetylcholine, therefore
impulses are not able to travel across synapses.
O
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