Essay on Frog Nerve

1326 Words Apr 15th, 2016 6 Pages
Frog Nerve
Exercise 1: Action Potential Threshold
Using the Horizontal Compression buttons and the scroll bar display the data you wish to include in your report.

Study Questions 1. How does a CAP differ from a single action potential? 1. How does a CAP differ from a single action potential?
Answer
CAP or compound action potential is a measure of the sum of the "all or none" single action potential of a group of fibers in a single nerve. The single action potentials are events that occur when sodium channels are activated causing the depolarization of a neuron. Single Action potentials are considered to be all or none responses, they travel down the length of the axon and then release a neurotransmitter into the synapse.
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What other stimulus parameter might also affect the nerve's tendency to generate a CAP?
Answer
Duration as well as frequency can affect the nerve’s tendency to generate CAP. Duration can affect a nerves tendency to generate CAP because even a weak signal can generate CAP if it lasts long enough. Frequency can affect the nerves tendency to generate CAP because if there is the right amount of time between each action potential, the effects of them can preserved and a CAP can be generated.
Exercise 2: Refractory Period
Using the Horizontal Compression buttons and the scroll bar display the data you wish to include in your report.

Study Questions 5. Explain the difference between the relative and absolute refractory periods. 5. Explain the difference between the relative and absolute refractory periods.
Answer
A refractory period is when all sodium channels are inactivated and only the delayed potassium channels are open. When this happens the membrane can not produce a second action potential no matter how strong the stimulus becomes. During this period there are two different phases, the absolute refractory period and the relative refractory period. During the absolute refractory period there is absolutely no way that a stimulus will produce an action potential. This phase generally lasts until the first sodium channels are able to respond to a stimulus again. In the second phase, relative refractory

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