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During the pacemaker potential in pacemaker cells _____ through voltage gated channels A. Ions enter cells...

During the pacemaker potential in pacemaker cells _____ through voltage gated channels

A. Ions enter cells down concentration and charge gradients

B. Ions exit cells down concentration but with charge gradient

C. Ions exit cells down concentration and charge gradients

D. Ions enter cells down concentration but against charge gradient

Please try to explain the reason,ty.

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Answer #1

A. Ions enter cells down concentration and charge gradients.

When the pacemaker potential reach the pacemaker cells, the cells get depolarised. Due to the depolarisation, the voltage gated ion channels open up. Now, the opened voltage gated ion channels help the ions to diffuse into the cells along with their electrochemical gradient. As it is a diffusion process, ions will always diffuse down the electrochemical gradient and make the cells more depolarised creating action potential which will relay down the path.

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