How can a gated channel protein be opened? SELECT ALL THAT APPLY a chemical or electrical signals b temperature c mechanical force

## Step 1
Gated channel proteins are integral membrane proteins that allow ions to pass through the channel pore. They are regulated by various factors such as chemical or electrical signals, temperature, and mechanical force.

## Step 2
Chemical or electrical signals: These signals can cause a change in the shape of the protein, opening the channel. This is a common mechanism in nerve cells, where the electrical signal (an action potential) opens the sodium channel, allowing sodium ions to enter the cell.

## Step 3
Temperature: Changes in temperature can affect the kinetic energy of the particles, which can cause the protein to change shape and open the channel. However, this is not a common mechanism for gated channel proteins.

## Step 4
Mechanical force: This can cause a physical change in the protein, opening the channel. This is common in muscle cells, where the mechanical force of muscle contraction opens the calcium channel, allowing calcium ions to enter the cell.