Diffusion and Osmosis Notes

Multiple Choice

Diffusion is the movement of a substance of high concentration to a region of ________ concentration.

• high

• low

Open Ended

What is an example of diffusion in the human body?

Multiple Choice

If too many calcium ions are inside a cell, how would the concentration change?

• More Ca+ ions will enter the cell by carrier proteins

• More Ca+ ions will enter the cell by diffusing through the plasma membrane.

• Excess Ca+ ions will be transported out through protein channels.

• Excess Ca+ ions will leave the cell via osmosis.

Multiple Choice

What is the macromolecule that supports facilitated diffusion?

• Carbohydrate

• Lipid

• Protein

• Nucleic Acid

Open Ended

What does "semi-permeable membrane" mean?

Open Ended

What is a solute?

Multiple Choice

Salt and glucose are examples of -

• solutes

• solutions

• proteins

• lipids

Multiple Choice

Which of the following should be concluded about dialysis tubing with semipermeable membranes when placed in a solution with a higher concentration of water?

• Water enters the tubing

• Water leaves the tubing

Multiple Choice

Why is water moving into the cell?

• The concentration of solute in the cell is higher than it is outside the cell.

• The concentration of water outside the cell is lower than it is inside the cell.

Multiple Choice

What will happen to an animal cell placed in a salt water solution?

• The cell will shrink

• the cell will expand

• the cell will burst

Multiple Choice

If a person with swollen gums rinses their mouth with salt water, what would happen?

• The swelling decreases

• The gums stay the same

• The swelling increases

Multiple Choice

Why does the swelling decrease if a person rinses their mouth with salt water?

• Water moved out of the gums

• The gums absorbed the salt

• Salt has moved out of the gums

• Water has moved into the gums

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