Question

How do cells transport things in and out as needed by the cell?

Answer 1

Cells use Transport Proteins to transport everything the cell needs inside and outside.

Explanation:

The transport proteins control what comes in, but there is an entire transport system within the cell that determines what the transport protein will let into the cell.

Answer 2

I'd say through diffusion and osmosis.

Explanation:

Well, nutrients enter the cell through the cell membrane. That means that the cell also can transport proteins, ions, water, through the cell membrane.

Water is transported by a process called osmosis. Other nutrients are transported by diffusion and by passive and active transport, where the latter requires energy from the cell.

Sources:

https://www.khanacademy.org/test-prep/mcat/cells/transport-across-a-cell-membrane/a/passive-transport-and-active-transport-across-a-cell-membrane-article

https://www.ck12.org/biology/cell-transport/lesson/Cell-Transport-Advanced-BIO-ADV/