A neuron's ability to generate action potentials depends: Question 1 choices Choice A., on the axon reaching threshold and the opening of voltage-gated sodium channels, allowing sodium to enter the axon. Choice B., on the axon reaching threshold and the opening of voltage-gated sodium channels, allowing sodium to leave the axon. Choice C., on the immediate opening of voltage-gated potassium channels once threshold has been reached, allowing potassium to leave the axon. Choice D., on the immediate opening of voltage-gated potassium channels once threshold has been reached, allowing potassium to enter the axon.

Question

Jackson Le

Biology

28 November, 11:16

A neuron's ability to generate action potentials depends: Question 1 choices Choice A., on the axon reaching threshold and the opening of voltage-gated sodium channels, allowing sodium to enter the axon. Choice B., on the axon reaching threshold and the opening of voltage-gated sodium channels, allowing sodium to leave the axon. Choice C., on the immediate opening of voltage-gated potassium channels once threshold has been reached, allowing potassium to leave the axon. Choice D., on the immediate opening of voltage-gated potassium channels once threshold has been reached, allowing potassium to enter the axon.

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Stephen Mcdonald · Answer 1

Answer is A

Firstly axon must reach the threshold level and then depolarisation occurs. Depolarisation phrase means sodium enters and potassium leaves the axon. Choice C can't be because main idea is the entering of sodium ions.