The movement of ions is usually called flux, the inward movement into the cells is (A)____ and outward movement is (B)____

Answer

To solve the question regarding the movement of ions, we can break it down into the following steps:

### Step-by-Step Solution:

1. **Understanding Ion Movement**: The question states that the movement of ions is referred to as "flux." This term encompasses both the inward and outward movement of ions in relation to the cells.

2. **Identifying Inward Movement**: The inward movement of ions into the cells is characterized by the entry of ions. This process is specifically termed as "influx."

3. **Identifying Outward Movement**: Conversely, the outward movement of ions from the cells involves the exit of ions. This process is referred to as "efflux."

4. **Filling in the Blanks**: Based on the definitions:
- For the inward movement (A), the answer is **influx**.
- For the outward movement (B), the answer is **efflux**.

### Final Answers:
(A) influx
(B) efflux

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