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Biology 14 Online
OpenStudy (anonymous):

is diffusion the only way materials can enter the cell

OpenStudy (anonymous):

not only through difussion by endocytosis also

OpenStudy (anonymous):

so would it be no; the cell is capable of actively transporting materials across its membrane

OpenStudy (anonymous):

diffusion is movement of water from higher concentration to lower concentration

OpenStudy (nincompoop):

not "water" but particles

OpenStudy (bioepic):

Yeah. Other than diffusion, there is also active transport.

OpenStudy (bioepic):

Active transport is when the cell expends energy to move particles against a concentration gradient.

OpenStudy (bioepic):

Osmosis the diffusion of water across a membrane.

OpenStudy (nincompoop):

it is gradient concentration but when it comes to cell membrane we call it a special diffusion, an OSMOSIS

OpenStudy (bioepic):

So the answer is no, other than diffusion there is also active transport.

OpenStudy (nincompoop):

smaller molecules can pass through cell membranes without aid or via active transport

OpenStudy (nincompoop):

active transport system are very specific that they require certain signals, which you will learn when you start taking cell biology

OpenStudy (anonymous):

active transport is not concentration gradient.it requiere energy like ATP..

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