Question

• when the neuron is stimulated strongly enough, an action potential is triggered. this causes sodium ions to rush in and flip the charge to positive in a process is called blank.
• after the signal passes, the neuron works to restore its negative charge by pushing positive ions back out, a process called blank. during this resetting time, the neuron is in a brief blank, meaning it cannot fire again until it has fully recovered.

Explanation:

1. The process where sodium ions rush in and flip the charge to positive when an action potential is triggered is called depolarization.
2. After the signal passes, the neuron pushes positive ions back out to restore its negative charge, and this process is called repolarization.
3. During the resetting time (after repolarization, often involving hyperpolarization briefly, but the key phase where it can't fire again immediately is the refractory period (specifically the absolute refractory period initially, then relative).

Let's fill in the blanks:

• First blank (process with sodium influx, charge flips to positive): Depolarization
• Second blank (pushing positive ions out, restoring negative charge): Repolarization
• Third blank (state where neuron can't fire again until recovery): Refractory Period

Answer:

1. The process is called \(\boldsymbol{\text{depolarization}}\).
2. The process is called \(\boldsymbol{\text{repolarization}}\).
3. The neuron is in a brief \(\boldsymbol{\text{refractory period}}\).