THE CELL
TRANSPORT INTO AND OUT OF THE CELL
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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In facilitated diffusion, a special protein channel helps substances cross the cell membrane
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Facilitated diffusion requires ATP.
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Facilitated diffusion is not a form of passive transport.
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In facilitated diffusion, water flows through protein channels until it reaches the same concentration inside and outside the cell.
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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: -Answer and Explanation: The difference between passive, active and facilitated diffusion is that passive transport does not require energy, active transport does require energy and facilitated diffusion is a type of passive transport. Passive transport is a type of transport that does not require energy, or ATP.
Detailed explanation-3: -The difference is how the substance gets through the cell membrane. In simple diffusion, the substance passes between the phospholipids; in facilitated diffusion there are a specialized membrane channels.
Detailed explanation-4: -Ans) In simple diffusion, particles move in the direction of the concentration gradient, which is the direction of the concentration gradient. In facilitated diffusion, the movement of molecules can occur both in the direction of the concentration gradient and in the opposite direction of the gradient.