Depolarization and repolarization changes that occur during the action potential are produced by ____________(a) Negative feedback loops(b) Carrier mediated transport(c) Simple diffusion of ions down their concentration gradient(d) Active transport pumps along the neuron membraneThe question was posed to me in final exam.The question is from Gated Ion Channels topic in division Biosignalling of Biochemistry

Depolarization and repolarization changes that occur during the action

1.	Depolarization and repolarization changes that occur during the action potential are produced by ____________(a) Negative feedback loops(b) Carrier mediated transport(c) Simple diffusion of ions down their concentration gradient(d) Active transport pumps along the neuron membraneThe question was posed to me in final exam.The question is from Gated Ion Channels topic in division Biosignalling of Biochemistry
Answer» The correct OPTION is (d) Active transport pumps along the neuron membrane Easy EXPLANATION: NA^+ channels open at the beginning of action potential and moves into the axon causing depolarization, when K^+ channels open REPOLARIZATION TAKES place and moves out of the axon.

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