Question

what happens to a neuron when it becomes activated? multiple choice negatively charged ions flow into the neuron, while the positively charged ions move outside the nerve cell. positively charged ions flow into the neuron, while the negatively charged ions move outside the nerve cell. gates along the cell membrane remain closed. negatively charged ions move inside the nerve cell, while positively charged ions flow out of the neuron.

Explanation:

When a neuron is activated (depolarization), voltage - gated ion channels open. Positively charged ions (like $Na^+$) flow into the neuron, and negatively charged ions (like $Cl^ -$ or some anions) move outside or are less dominant in inward flow. The first option has wrong ion flow (negative in, positive out). The third option is wrong as gates open. The fourth option has wrong ion movement (negative in, positive out). So the correct description is the second option.

Answer:

B. Positively charged ions flow into the neuron, while the negatively charged ions move outside the nerve cell.