SCIENCE
CELL BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The movement of ions or molecules across a cell membrane into a region of higher concentration, including assistance from ATP energy and enzymes.
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Process of passive transport of molecules or ions across a cell’s membrane.
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Taking of matter by a living cell by invagination of its membrane to form a vacuole.
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All of the above
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Detailed explanation-1: -Facilitated diffusion is the passive movement of molecules along the concentration gradient. It is a selective process, i.e., the membrane allows only selective molecules and ions to pass through it. It, however, prevents other molecules from passing through the membrane.
Detailed explanation-2: -In facilitated transport, membrane proteins assist the diffusion of materials through the cell membrane. The protein binds the molecule being transported on the surface of the membrane, then passes it to interior proteins that typically form a channel or pore in the membrane.
Detailed explanation-3: -Facilitated transport is a type of passive transport. Unlike simple diffusion where materials pass through a membrane without the help of proteins, in facilitated transport, also called facilitated diffusion, materials diffuse across the plasma membrane with the help of membrane proteins.
Detailed explanation-4: -Passive transport is defined as movement of a solute from a region of high electrochemical potential on one side of the cell membrane to a region of lower electrochemical potential on the opposite side.
Detailed explanation-5: -Facilitated transport (or facilitated diffusion) is defined as a mediated transport not requiring energy expenditure, as exemplified by placental glucose transfer, which is mediated by facilitative glucose transporters expressed in the syncytiotrophoblast MVM and BM.