The functioning of the Na-K pump transport mechanism falls by 50% if the pH:

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The Na-K pump, an essential membrane protein that maintains cell potential and volume, is sensitive to pH changes. A decrease in pH by 1 unit can significantly affect its function, reducing its activity by about 50%. This is because the pump's activity is highly dependent on the cellular environment's pH, and even slight acidification can alter its conformation or the availability of protons necessary for its ATPase activity.

The Functioning of the Na-K Pump Transport Mechanism Falls by 50