Cellular Transport through Proteins

In order to maintain homeostasis, cells require a mechanism for regulating the molecules that move into and out of the cell. The phospholipid bilayer membrane contains integral proteins that perform this regulation in three ways. Passive transport requires no energy or integral proteins, and involves molecules working with the flow of the concentration gradient to move from areas of high solute concentration to areas of low solute concentration. Facilitated transport also requires no energy, but uses the integral proteins embedded in the cell to facilitate the transport of molecules across the cell membrane. The last method of transport, active transport, requires both energy and an integral protein to transport a molecule across a cell membrane. Energy is required because active transport moves molecules from areas of low solute concentration to areas of high solute concentration, and thus works against the concentration gradient. With active transport, the integral protein captures the molecule it wishes to transport and pumps it across the cell membrane.

Category:

Science & Technology

Tags:

• cell
• transport
• proteins

[daisyBCD]

you havnt named them diffusion and osmosis

[kelanahr]

this is good and basic! and if you dont like the music, i know its reallll hard to click the mute button ya fools

[naturenut1967]

I like this video, well explained, now I can finish my homework and hopefully pass my test.

[BarneyEire0900]

Ah yea to be fair,it would be :D

[mumyacount]

lol it was stupid, the music IS distracting...

[BarneyEire0900]

It was a stupid comment an what was more disturbing was the fact you agrred with it...have you ever heard of volume control

[vikingmetal99]

i have a test tomorrow and you totally saved my life

[Lexzly]

good

[mumyacount]

agreed

[oi12oi90]

the music is so distracing