Some researchers have found that polyunsaturated fatty acids (PUFAs) raise the threshold potential required for an action potential, lower the resting membrane potential, and short
2.
Some researchers have found that polyunsaturated fatty acids (PUFAs) raise the threshold potential required for an action potential, lower the resting membrane potential, and shorten the duration of an action potential. For individuals with heart problems, these effects could potentially prevent spontaneous stimulation to the heart, which could induce irregular heartbeats.
Because PUFAs increase the threshold potential, neurons require
Select one:
a.more stimulation than before to depolarize
b.less stimulation than before to depolarize
c.more stimulation than before to repolarize
d.less stimulation than before to repolarize
4.
Nicotine is a highly addictive chemical found in the leaves of the tobacco plant. In smaller doses, it acts as a stimulant and stimulates the release of glucose from the liver and epinephrine from the adrenal gland.
The speed at which nicotine affects the individual can be best described as
Select one:
a.slow, as it works through the pancreas of the endocrine system
b.slow, as it works through the adrenal glands of the endocrine system
c.fast, as it works through the autonomic nervous system
d.fast, as it works through the somatic nervous system
5.
The nerve impulse from an interneuron goes to
Select one:
a.1
b.3
c.5
d.6
9.
The ____A______ amplify(ies) the mechanical vibrations, and the ____B______ produces the electrochemical impulses.
Which of the following rows completes the statement above?
Select one:
a.
A B
Semicircular canals
Cochlea
b.
A B
Ossicles
Organ of Corti
c.
A B
Cochlea
Organ of Corti
d.
A B
Organ of Corti
Cochlea
10.
Changes in the Membrane Potential of a Neuron
Why was there a change in the membrane potential between 0 ms and 0.5 ms?
Select one:
a.sodium ions rushed out
b.potassium ions rushed in
c.potassium ions rushed out
d.sodium ions rushed in
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