Question

The voltage gated sodium channels undergo changes in activity during the depolarization phase of an action potential. place these in order from first to last

1. the membrane potential is -70mv

2. sodium ions flow into the neuron

3. the membrane potential becomes more positive

4. voltage gated sodium ion channels open

Answer 1

The correct order of events during the depolarization phase of an action potential is: membrane potential is -70mV, voltage gated sodium ion channels open, sodium ions flow into the neuron, and the membrane potential becomes more positive.

Step-by-step explanation:

The correct order of events for the changes in activity of voltage gated sodium channels during the depolarization phase of an action potential is as follows:

1. The membrane potential is -70mV
2. Voltage gated sodium ion channels open
3. Sodium ions flow into the neuron
4. The membrane potential becomes more positive

Answer 2

The correct order is 4, 1, 2, 3.

• During the depolarization phase of an action potential, the voltage-gated sodium channels open in response to the initial stimulus.

• Before the depolarization, the resting membrane potential is typically around -70 mV.

• With the opening of the voltage-gated sodium channels, sodium ions flow into the neuron, contributing to the depolarization of the membrane.

• As sodium ions enter, the membrane potential becomes more positive, reaching the threshold for an action potential.