Transport In Cells: Active Transport | Cells | Biology | FuseSchool

Transport In Cells: Active Transport | Cells | Biology | FuseSchool
In the first part of this video, we looked at diffusion to move gases and osmosis for the movement of water, from high concentration to low concentration down their concentration gradient. You can watch it here: • Transport in Cells: Di...
Active transport works in the opposite direction; it moves molecules from a low concentration to a high concentration, against the concentration gradient. This is the opposite of diffusion and osmosis. And because it is not the natural direction, energy from is required to make this work.
Active transport is carried out by protein carriers. The protein carriers are within the cell membrane and they have a specific binding site for the exact molecule they are transporting. The substance binds to the protein carrier on the side that it is at low concentration. And using energy from respiration, the protein carrier releases the substance on the other side of the membrane - where it is already at a higher concentration.
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Can you name different factors which affect the rate diffusion and how?

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i love this video and this might be unrelated but can someone pls explain to me what OSMOTIC PRESSURE AND OSMOTIC POTENTIAL are

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so active transport is from low potential to high potential of something and specialised cells like the muscles need a lot of mitochondria because they retract also active transport needs a lot of power that's why when active transport happens its somewhere with a high concentration of mitochondria (active transport goes against the concentration gradient which is high to low but active transport is from low to high)

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