Hole's Human Anatomy & Physiology (Shier), 12th Edition

Ph.I.L.S. 3.0 Quizzing 25: Ph.I.L.S. 3.0 Quizzing

Ph.I.L.S. 3.0 Quizzing

1
A low voltage electrical shock (0 or 0.1 volts) produced no response on the screen because:
A)the action potentials were too small to register.
B)the shock did not reach the recording electrodes.
C)the shock did not produce any action potentials.
2
The smallest response you recorded, with a shock around 0.3 volts, was produced because:
A)only a few axons were brought to threshold, so only these few axons produced an action potential.
B)all of the axons were brought to threshold, but the low shock voltage produced a small action potential.
C)all axons produced only one action potential.
3
Increasing the shock voltage from about 0.3 to 1 volt increased the amplitude of the CAP. This observation can be explained by:
A)an increase in the number of action potentials produced by increasing the shock voltage.
B)an increase in the number of axons brought to threshold and producing a single action potential.
C)an increase in the size of the action potentials.
4
CAP amplitude reached a maximum when the shock voltage was above a certain level. This certain level of shock voltage was:
A)0 volts.
B)around 0.3 volts.
C)around 1 volt.
D)around 1.5 volts.
5
A high voltage shock produced a CAP with maximum amplitude because:
A)all of the axons in the nerve produced an action potential.
B)all of the axons were producing a burst of action potentials.
C)the action potential in each axon had reached a maximum amplitude.
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