1. The resting membrane potential of a neuron is established by byhannels A volt

Question

1. The resting membrane potential of a neuron is established by byhannels A voltage-gated potassium channels and voltage-gated sodium channels. B. voltage-gated sodium channels, and voltage gated calcium channels C. the sodim potasslum pump, and leakage ion channels. 2. A small, negatively directed change in membrane potential, that arises in a neuron because of signaling from a pre-synaptic cell, would be called aln) A depolarizing graded potential change B. excitatory graded potential change C action potential D hyperpolarizing graded potential change 3. In the initial formation of an action potential in a neuron, which of these is the correct order of events? L- voltage-gated Ke channels begin to open M- voltage-gated Nat channels begin to open N- Na+ from outside the cell enters the cell at the axon hillock, through voltage-gated Nay channels o- graded potential changes reach the axon hillock A NMOL 8 OMNL ?.NMLO D. OLMN E. MNOL

Explanation / Answer

1-A

2-C

3-E

Note- the change in the resting membrane lead to opening of voltage gated na+ channel which lead to depolarization of themembrane following the slow opening of voltage gate k+ channel.

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