THE CELL
STRUCTURE AND FUNCTION OF THE CELL
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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They both allow everything to pass through.
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Neither allow anything to pass through.
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They both allow certain things to pass through, while blocking the passage of others.
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They are not similar to each other at all.
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Detailed explanation-1: -Harmful waste products leave the cell through the cell membrane. For a cell to survive, the cell membrane must allow these materials to pass into and out of the cell. In a sense, the cell membrane is like a window screen. The screen keeps insects out of a room.
Detailed explanation-2: -Transport Across the Cell Membrane The phospholipids are tightly packed together, and the membrane has a hydrophobic interior. This structure causes the membrane to be selectively permeable. A membrane that has selective permeability allows only substances meeting certain criteria to pass through it unaided.
Detailed explanation-3: -In other words, plasma membranes are selectively permeable; they allow some substances to pass through, but not others. If they were to lose this selectivity, the cell would no longer be able to sustain itself, and it would be destroyed.
Detailed explanation-4: -The cell membrane’s main trait is its selective permeability, which means that it allows some substances to cross it easily, but not others. Small molecules that are nonpolar (have no charge) can cross the membrane easily through diffusion, but ions (charged molecules) and larger molecules typically cannot.