Cell Transport Review

How can large or charged molecules diffuse the cell membrane?

• through channel transport proteins (facilitated diffusion)

• through protein pumps (active transport)

• directly through the lipid bilayer

• all of these

When cells are placed in a __________ solution they begin to swell.

• Hypertonic
• Isotonic
• Hypotonic
• Equalized

Tags

NGSS.MS-LS1-2

If a cell containing 5% salt is is surrounded by a 20% salt solution, the solution is _______ compared to the cell. Therefore, water moves ________ the cell.

• hypertonic, in

• hypotonic, out

• hypotonic, in

• hypertonic, out

Tags

NGSS.HS-LS1-3

If you looked at red blood cells under a microscope and saw the blood cells enlarged and some that have bursted open, what would you say happened?

• The cells were surrounded by a hypotonic solution.

• The cells were surrounded by an isotonic solution

• The cells were surrounded by an hypertonic solution

Tags

NGSS.HS-LS1-3

0.9% NaCl is isotonic to red blood cells. Which of these describes what will happen if a technician misplaces a decimal point and makes 9.0% NaCl solution instead and administers it to a patient?

• The cells exposed to the solution will burst.

• The cells exposed to the solution will lose water and shrivel up.

• The cells will remain the same size.

• The cells exposed to the solution will expand but not burst.

Tags

NGSS.HS-PS1-5

A cell in an isotonic solution will

• swell
• shrink
• stay the same size
• impossible to tell

Sodium-potassium pumps in your cells require energy to move ions across the cell membrane against their concentration gradient so it is a type of

• active transport

• osmosis

• diffusion

• facilitated diffusion

If a molecule passes through a protein, is spreading out over time (going down its concentration gradient), this is

• active transport

• simple diffusion

• facilitated diffusion

• osmosis

A major distinction between active and passive transport is

• active transport is the movement of water and passive is the movement of all other substances
• actives u ses a transport protein, while passive does not
• active moves particles against the concentration gradient while passive moves particles with the gradient
• a transporter protein can change shape in active transport but not in passive

What would happen to the purple molecules over time if they were able to move across this membrane freely?

• There would be a net movement of molecules from A side to B side until there is a balance

• There would be a net movement of molecules from the B side to the A side until all were on the A side

Tags

NGSS.MS-LS1-2