An action potential consists of depolarization and repolarization. Which are the channels open during depolarization and during repolarization?

Explanation

### Step-by-Step Solution:

1. **Understanding Resting State**:
- In the resting state of a neuron, the membrane is primarily permeable to potassium ions (K+) and less permeable to sodium ions (Na+). This results in a resting membrane potential, typically around -70 mV.

**Hint**: Remember that during resting potential, the neuron is not transmitting any signals.

2. **Threshold Stimulus**:
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