Final answer:
Potassium leak channels are crucial for establishing the resting membrane potential, while the Na+/K+ pump helps maintain ion concentration gradients.
Explanation:
Potassium leak channels are the most important membrane proteins in establishing the resting membrane potential of a cell. These channels allow potassium ions to move across the membrane, contributing to the overall resting potential. On the other hand, the Na+/K+ pump plays a crucial role in maintaining the concentration gradients of sodium and potassium across the membrane, but it is not directly involved in establishing the resting membrane potential. Additionally, Na+ leak channels are also present but are not as significant as potassium leak channels in determining the resting membrane potential.
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