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15 Cards in this Set
- Front
- Back
The nerve used in the experiment this week is named the ___________ nerve.
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sciatic
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The nerve to used in the experiment this week innervates the frog's _________.
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leg
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The action potential is initiated in the nerve in response to stimulation that exceeds a critical value known as ___________.
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threshold
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The action potential is displayed by the use of a digital _________________.
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osciloscope
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The nerve contains a large number of axons; therefore the action potential measured is not from a single axon but the sum of the action potential from many axons; the action potential measured is therefore called the ______________ action potential.
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compound
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Conduction velocity is determined as _____________ divided by _____________.
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distance/ time
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Multiple components in the action potential are seen as a consequence of different axons having diameters and different states of myelination, resulting in these axons having different ____________ ____________.
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conduction velocity
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The stimulus that evokes an action potential from all the axons in the nerve is known as the ______________ stimulus.
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action
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The amplitude of the action potential increases as the stimulus is increased beyond threshold because additional _________ become active.
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axons
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To make the recording, the nerve is placed across a series of wires in a plastic box. Two of these electrodes are used for ______________ and two are used for _____________.
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stimulation/recording
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The action potential that is first recorded when the nerve is first placed in the plastic box has two phases and is known as _____________.
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biphasic
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To convert the action potential from one having two phases to one having only a single phase one must ________ the nerve between the two recording electrodes.
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crush
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Two of the wires from the plastic nerve box are connected to a differential amplifier. This amplifier records the ____________ in potential between its two inputs.
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mvolts
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The duration of the action potential is measured in units called ___________ (unit should include power of ten).
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msec
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The ____________ period is the time after an action potential during which the nerve is unable to generate a second action potential.
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refractory
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