Lab: Diffusion Across a Semi-permeable Membrane

Question 1

Which definition is the best for “semipermeable membrane”?

Revolt · Accepted Answer

It is a barrier with tiny openings that let some, but not all, materials pass through.

Question 2

When materials diffuse across a membrane, they move from an area of concentration to

Revolt · Accepted Answer

high

Question 3

an area of concentration along the concentration gradient.

Revolt · Accepted Answer

low

Question 4

Which part of the cell is semipermeable, or controls what enters and leaves the cell?

Revolt · Accepted Answer

cell membrane

Question 5

In the lab experiment, the semipermeable membrane you will use is dialysis tubing, shown above with a solution inside. Which part of a cell is the dialysis tubing most similar to?

Revolt · Accepted Answer

cell membrane

Question 6

Check all correct elements below that you included in your hypothesis.

Revolt · Accepted Answer

correct conclusion (“then”): Molecules will diffuse through the membrane; correct reason (“because”): Molecules can pass through the membrane’s tiny openings.

Lab: Diffusion Across a Semi-permeable Membrane Answers

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