Match the following columns:

Column-$I$	Column-$II$
$(A)$ Movement of ions into or out of the cell	$(1)$ Diffusion
$(B)$ Outward movement is	$(2)$ Flux
$(C)$ Inward movement is	$(3)$ Efflux
$(D)$ Passive uptake	$(4)$ Influx

Compare various transport processes.

In the light of the carrier concept,the transport of ions across the membrane is:

What are the aquaporins in the facilitated diffusion process?

$S -$ Statement: Energy is consumed during active transport.
$R -$ Reason: This transport occurs against the concentration gradient of the substances.

Read carefully the following statements and choose the right answer from the options given below.
$I$. Diffusion is a slow process and it does not depend upon the living system.
$II$. Usually,the process of diffusion does not need energy.
$III$. Diffusion can occur from one part of a cell to another part of the same cell,or from one cell to another,and from one tissue to another tissue.
$IV$. Diffusion is a rapid process over short distances,but extremely slow over long distances.