A polarized neuron is characterized by the presence of more __ ions along the plasma membrane outside the cell and le the plasma membrane inside the cell. C sodium; calcium sodium; potassium potassium; sodium calcium; sodium

## Step 1<br />A polarized neuron is a neuron that is in a state of rest, meaning it is not transmitting any signals. In this state, the inside of the neuron is negatively charged compared to the outside. This is due to the distribution of ions across the neuron's plasma membrane.<br /><br />## Step 2<br />The inside of the neuron is rich in potassium ions (K+), which are positively charged. This is because the neuron's membrane is selectively permeable, allowing potassium ions to enter the cell while preventing other ions from doing so.<br /><br />## Step 3<br />On the other hand, the outside of the neuron is rich in sodium ions (Na+), which are also positively charged. This is because the neuron's membrane is selectively permeable, allowing sodium ions to exit the cell while preventing other ions from doing so.<br /><br />## Step 4<br />The difference in the concentration of these ions across the membrane creates a voltage difference, known as the resting potential. This voltage difference is what allows the neuron to transmit signals when it is activated.