What is influx ?

Explanation

**Step-by-Step Solution:**

1. **Definition of Influx**: The term "influx" refers to the arrival or entry of a large number of things or molecules into a specific area or space.

2. **Context in Biology**: In biological terms, influx is often used to describe the movement of ions or molecules into a cell.

3. **Example of Influx**: Consider a cell that has channel proteins in its membrane. If sodium ions are more concentrated outside the cell than inside, and the channel proteins open, sodium ions will enter the cell. This process is referred to as "sodium influx."

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