1a. Explain the changes in ion channels and fluxes that shape a single action po
ID: 3508520 • Letter: 1
Question
1a. Explain the changes in ion channels and fluxes that shape a single action potential in a nerve cell. Assume that the nerve has received an initial input from an external stimulus (i.e. you stepped on a tack).
1b. What would happen if you received a second external stimulus 3 milliseconds second after the first? Explain your answer.
1c. What do you predict would happen to the shape of the action potential you described in part 1a if you applied a toxin to the nerve, such that you prevented the inactivation of Na+ channels?
Explanation / Answer
1b,if the stimulus is received during absolute refractory period no reponse will be there. and if the stimulus is given in relative refractory period,action potential may be produced
1c,the toxins cause prolonged activation of Na channel that is prolonged depolarization.so the action potential graph becomes more tall.
1a,
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