The Difference Between Passive and Active Transport

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Cell Biology

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The Difference Between Passive and Active Transport

The movement of material across the cell membrane without using cellular energy is called passive transport. The movement of materials against a concentration difference is known as active transport.

Active Transport is different than passive transport because the process uses energy to transport substances. It uses protein pumps to transport the small molecules to reach the equailibrium. Two types of active transport are molecular transport and bulk transport, molecular uses energy to concentrate substances to a particular location and bulk transport, like it's name carries large moloecules and solid clumps of materials. Examples of active transport are endocytosis, endo- meaning inside which is the process of taking materials into the cell by means of pockets of the cell membrane. Another example is exocytosis, exo- meaning outside the process when cells release large amounts of material, then the cell membrane fuses with the membrane of the vacuole, removing contents out of the cell.

Passive transport is different than active transport because this process of transportation requires no cellular energy. Examples of passive transport are diffusion and facilitated diffusion. Diffusion is the process by which the particles move from a high area of concentration to a low area of concentration, the which is common for the movement of many molecules across the cell membrane. Facilitated diffusion is similar to difffusion because this time special protein channels are helping move the molecules that cannot diffuse directly across the membrane. An example of facilitated diffusion is osmosis, the diffusion of water through a selectively permeable membrane. This time it is transporting water molecules through water protein channels called aquaporins, that allow water to pass through them.

Both provide transportation of molecules in and out of the cell.

The Difference Between Passive and Active TransportJustin Schwarz, Period 3


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