AnswersHVA 26-27 IM Biology ALab: Diffusion Across a Semi-permeable Membrane

Lab: Diffusion Across a Semi-permeable Membrane Answers

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1
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Which definition is the best for “semipermeable membrane”?

A
It is a barrier that prevents materials from moving from one side to the other.
B
It is a barrier that allows materials to move freely from one side to the other.
C
It is a barrier with tiny openings that let some, but not all, materials pass through.
D
It is a barrier that helps materials move from one side to the other.
2
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When materials diffuse across a membrane, they move from an area of ✔ highlow equalneutral concentration to

A
high
B
low
C
equal
D
neutral
3

an area of high✔ lowequalX neutral concentration along the concentration gradient.

A
high
B
low
C
equal
D
neutral
4

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

A
mitochondrion
B
cytoplasm
C
endoplasmic reticulum
D
cell membrane
5

Which definition is the best for “semipermeable membrane”?

A
It is a barrier that prevents materials from moving from one side to the other.
B
It is a barrier that allows materials to move freely from one side to the other.
C
It is a barrier with tiny openings that let some, but not all, materials pass through.
D
It is a barrier that helps materials move from one side to the other.
6

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

A
mitochondrion
B
cytoplasm
C
endoplasmic reticulum
D
cell membrane
7

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?

A
cell wall
B
nucleus
C
cytoplasm
D
cell membrane
8

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? cell wallnucleuscytoplasmcell membrane

A
cell wall
B
nucleus
C
cytoplasm
D
cell membrane
9

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

A
format: “What is the effect of X on Y?”
B
independent variable: molecule size
C
dependent variable: ability to diffuse across a semipermeable membrane
10

Question text not available

Answers:
concentration to:high
concentration along the concentration gradient.:low
11

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

A
format: “What is the effect of X on Y?”
B
independent variable: molecule size
C
dependent variable: ability to diffuse across a semipermeable membrane
12

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

A
correct conclusion (“then”): Molecules will diffuse through the membrane
B
correct reason (“because”): Molecules can pass through the membrane’s tiny openings.
13

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

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

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