75% CO2

47% CO2

1. Is this diffusion, osmosis, or active transport if the CO2 moves into the cell?

53% Water

81% Water

2. Is this diffusion, osmosis, or active transport if water moves out of the cell?

24% Food

40% Food

3. Is this diffusion, osmosis, or active transport if food moves into the cell?

4. If diffusion occurs, which direction will the oxygen move?

59% Oxygen

43% Oxygen

Salt Water Solution

5. If osmosis occurs, will water move into this cell or out of this cell?

Passive Transport:

• In diffusion, substances move from areas of HIGHER concentration to areas of LOWER concentration.

Passive Transport:

• If the substance that is moving from high concentration to low concentration is water, then we call it osmosis.

Active Transport:• If diffusion just won’t work (maybe

because the substance needs to come in but diffusion would be forcing it out), then the cell has to use energy to make the substance go from low to high.

75% CO2

47% CO2

1. Is this diffusion, osmosis, or active transport if the CO2 moves into the cell?

diffusionHigh

outside

Low inside

It’s moving from high to low, but it’s not water… so it’s

53% Water

81% Water

2. Is this diffusion, osmosis, or active transport if water moves out of the cell?

Low outside

High inside

The water is moving from high to low… that’s diffusion, but hey, it’s WATER!

Osmosis

24% Food

40% Food

3. Is this diffusion, osmosis, or active transport if food moves into the cell?

Low outside

High inside

This food is moving into the cell, that’s from low to high – that’s not

diffusion!Active

transport

4. If diffusion occurs, which direction will the oxygen move?

59% Oxygen

43% Oxygen

High outside

Low inside

It’s just a bit higher outside, but the oxygen

would still try to balance, so it needs to…

Move intothe cell

Salt Water Solution

5. If osmosis occurs, will water move into this cell or out of this cell?

Since this cell is in salt water, that means that

there is more water inside the cell than

outside….

The water would move out of this cell and

it would appear to shrink.