Lab: Diffusion Across a Semi-permeable Membrane

Question 1

Question 1

Revolt · Accepted Answer

, and the dependent variable: molecule size; .: ability to diffuse

Question 2

was molecule shape✔ ability to diffuserate of diffusion.

Revolt · Accepted Answer

✔ ability to diffuse

Question 3

Question 3

Revolt · Accepted Answer

. The beaker: starch solution and Lugol’s solution; .: only Lugol’s solution

Question 4

contains ✔ only Lugol’s solution starch solution and Lugol’s solution.

Revolt · Accepted Answer

✔ only Lugol’s solution

Question 5

The independent variable in this experiment was ✔ molecule sizemolecule colormolecule speed, and the dependent variable

Revolt · Accepted Answer

✔ molecule size; , and the dependent variable: molecule size; .: ability to diffuse

Question 6

The tubing contains ✔ starch solution Lugol’s solution starch solution and Lugol’s solution. The beaker

Revolt · Accepted Answer

✔ starch solution; . The beaker: starch solution

Question 7

Initially, glucose was found only ✔ insideoutsideboth inside and outsideneither inside nor outside the dialysis tubing. After 15 minutes, a sample was taken. That sample showed that glucose was found

Revolt · Accepted Answer

✔ inside; the dialysis tubing. After 15 minutes, a sample was taken. That sample showed that glucose was found: inside

Question 8

Analysis: Both glucose and starchNeither glucose nor starchOnly starch (larger molecules) ✔ Only glucose (smaller molecules) diffused though the semipermeable membrane.

Revolt · Accepted Answer

✔ Only glucose (smaller molecules)

Question 9

Based on what you learned in the lab, why does your body need to break down starch into glucose?

Revolt · Accepted Answer

Starch molecules are too large to diffuse into cells.

Question 10

contains .

Revolt · Accepted Answer

Lugol’s solution

Lab: Diffusion Across a Semi-permeable Membrane Answers

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