THE CELL
STRUCTURE AND FUNCTION OF THE CELL
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Protein channels
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Pumps
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Vesicles
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Detailed explanation-1: -Facilitated diffusion is the passive movement of substances, such as biological molecules or ions, across a plasma membrane by means of a transport protein located in the plasma membrane. Since the movement of substances is from greater to lesser concentrations, chemical energy is neither used nor required.
Detailed explanation-2: -Facilitated diffusion does not need any energy for the movement of molecules as they move from higher concentration to lower concentration gradient.
Detailed explanation-3: -Simple diffusion does not require energy: facilitated diffusion requires a source of ATP.
Detailed explanation-4: -Facilitated Diffusion Requires Membrane Carrier Proteins Facilitated diffusion is also calledcarrier-mediated diffusion because a substance transported in this manner diffuses through the membrane with the help of a specific carrier protein.
Detailed explanation-5: -Passive transport: This does not require any energy expenditure as it occurs along the concentration gradient of the molecule being translocated. Examples include simple diffusion, facilitated diffusion, and osmosis.