Question

question 18
how many sodium ions move out of the cell for every two potassium ions moved into the cell by the sodium - potassium pump?
three na+ for every two k+
two na+ for every one k+
two na+ for every three k+
one na+ for every two k+

Explanation:

The sodium - potassium pump is an important membrane transport protein. It uses the energy from ATP hydrolysis. The stoichiometry of the sodium - potassium pump is that for every cycle, it moves 3 sodium ions (\(Na^{+}\)) out of the cell and 2 potassium ions (\(K^{+}\)) into the cell. This helps in maintaining the electrochemical gradient across the cell membrane, which is crucial for various cellular functions such as nerve impulse transmission and muscle contraction.

Answer:

Three \(Na^{+}\) for every two \(K^{+}\)