AP BIOLOGY

LABORATORY REVIEW

DIFFUSION AND OSMOSIS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Partially permeable means:
A
things can pass through
B
the concentration levels are different
C
it is permanent
D
some thing pass others not
Explanation: 

Detailed explanation-1: -The prefix “semi” means some or partial, and “permeable” means to pass through. So, a semi-permeable membrane is a membrane that only allows certain materials to pass through. Semi-permeable membranes are different from permeable membranes, which allow the passage of all materials through the barrier.

Detailed explanation-2: -A semipermeable membrane, also termed a selectively permeable membrane, a partially permeable membrane or a differentially permeable membrane, is a membrane that will allow certain molecules or ions to pass through it by diffusion and occasionally specialized “facilitated diffusion". ( Wikipedia)

Detailed explanation-3: -Partially permeable cell membranes Some substances, such as gases and water, can pass across the membrane easily by diffusion. However, other substances, such as glucose, need to be transported across the cell membrane.

Detailed explanation-4: -Partially Permeable Membrane Small molecules, such as water can pass through the small holes in the membrane. But larger molecules like sugar cannot pass through the membrane.

Detailed explanation-5: -A membrane is a material or tissue that acts as a barrier or divider between two regions. A permeable membrane allows all substances to flow freely across the membrane. A semi-permeable membrane allows some substances to cross the membrane, but not others. An impermeable membrane blocks the movement of all substances.

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