When an action potential is generated, depolarization occurs along the length of

Question

When an action potential is generated, depolarization occurs along the length of the axon. What happens during depolarization?

a. The inside of the axon membrane becomes negatively charged relative to the outside when negatively charged sodium ions rush into the membrane

b. The inside of the axon membrane becomes negatively charged relative to the outside when negatively charged potassium ions rush into the membrane

c. The inside of the axon membrane becomes positively charged relative to the outside when positively charged sodium ions rush into the membrane

d. The inside of the axon membrane becomes positively charged relative to the outside when positively charged potassium ions rush out of the membrane

Explanation / Answer

Answer-c. The inside of the axon membrane becomes positively charged relative to the outside when positively charged sodium ions rush into the membrane

Explanation-Depolarization occurs when the nerve cell reverses positive and negative charge to change them back to an at-rest state, the neuron sends another electrical signal. The entire process occurs when the cell allows specific ions to flow into and out of the cell.It particularly occurs when ion channels in the membrane open or close, altering the ability of particular types of ions to enter or exit the cell. Example: Opening of channels that let Na + into the cell.Here the reason for this answer is ,when stimulus causes sodium channnels to open ,as the sodium is positively charged and there are many more sodium charges revoved outside .When these ions rush into the neurons that are negatively charged inside relative to the outside ,they become more positive and depolarized .

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