All cells are surrounded by a cell membrane that separates the cell from the outside environment. The cell membrane is selectively permeable, which means...

some substances can pass through the membrane while others cannot.

oxygen and food come in, while waste materials go out.

all substances can pass through it.

it can hear most things but not if they are homework related.

What are the two types of active transport?

Transport proteins pick up molecules outside the cell and carry them in.

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Lisa Polillo 5 perguntas

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1All cells are surrounded by a cell membrane that separates the cell from the outside environment. The cell membrane is selectively permeable, which means...
1. Asome substances can pass through the membrane while others cannot.
2. Boxygen and food come in, while waste materials go out.
3. Call substances can pass through it.
4. Dit can hear most things but not if they are homework related.
2Pretend the red dots are oxygen molecules. What process is illustrated?
1. ADiffusion
2. BOsmosis
3. CActive Transport
4. DDismosis
3Osmosis is the [blank_start]diffusion[blank_end] of [blank_start]water[blank_end].
1. Adiffusion
2. Bwater
4If you put a cell in a hypertonic solution (like salt water), what happens?
1. AIt shrinks.
2. BIt swells.
3. CIt remains unchanged.
4. DIt dances.
5What are the two types of active transport?
1. ATransport proteins pick up molecules outside the cell and carry them in.
2. BTransport by engulfing.
3. COsmosis
4. DDiffusion