Questions: Check all of the factors necessary for an action potential to occur. Check All That Apply Voltage gated sodium channels open Threshold is met Chemically gated potasslum channels open Chemically gated sodium channels remain closed Chemically gated chloride channels open Depolarization

To determine the factors necessary for an action potential to occur, we need to consider the physiological processes involved in the generation of an action potential in a neuron. Here are the relevant factors:

1. Voltage gated sodium channels open: This is necessary for the rapid depolarization phase of the action potential. When these channels open, sodium ions rush into the cell, causing the membrane potential to become more positive.

2. Threshold is met: An action potential is initiated only when the membrane potential reaches a certain threshold level. This is a critical factor for the action potential to occur.

3. Depolarization: This is the process of the membrane potential becoming more positive, which is essential for the initiation and propagation of an action potential.

Now, let's evaluate the other options:

• Chemically gated potassium channels open: These are not directly involved in the initiation of an action potential. Instead, voltage-gated potassium channels play a role in repolarization.

• Chemically gated sodium channels remain closed: This is not a necessary factor for an action potential. The opening of voltage-gated sodium channels is what is crucial.

• Chemically gated chloride channels open: This would typically lead to hyperpolarization, making it less likely for an action potential to occur.

Based on the above analysis, the necessary factors for an action potential to occur are:

• Voltage gated sodium channels open
• Threshold is met
• Depolarization

These are the key elements required for the initiation and propagation of an action potential in a neuron.