What is meant by influx and efflux?

(N/A) $\Rightarrow$ The movement of ions is generally referred to as flux.
$\Rightarrow$ The inward movement of ions into the cells is known as influx.
$\Rightarrow$ The outward movement of ions from the cells is known as efflux.
$\Rightarrow$ Both these processes often require the expenditure of metabolic energy,making them active transport processes.