Bio lab - diffusion and osmosis Flashcards


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1

Does diffusion require energy?

No

2

In diffusion how does molecules move?

From high concentration to low concentration

3

What is chemical potential?

The free energy available to do work to move one mole of molecule.

4

What is a semipermeable membrane?

It is for nonliving membranes because they cannot change their shapes to pass through. An example is dialysis.

5

What is a selectively permeable membrane?

For living membranes because they can alter their shapes to pass through. An example is a cell membrane

6

What are the factors that affect osmosis and diffusion?

Membrane permeability, molecular weight, concentration gradient, and temperature

7

What happens when a strong acid and a strong base meets?

Neutral chalk (precipitate)

8

What is a hypotonic solution? What happens in plant and animal cells?

There will be a net flow of water out of the cell, and the cell will lose volume.

Plant- turgid (normal)

Animal- Lysed (burst)

9

What is a hypertonic solution? What happens in plant and animal cells?

There will be a net flow of water into the cell, and the cell will gain volume.

Plant- shriveled (plasmolyzed)

Animal- shriveled

10

What is a isotonic solution? What happens in plant and animal cells?

There will be no net flow of water into or out of the cell, and the cell’s volume will remain stable.

Plant- flaccid

Animal- normal