Osmosis & Diffusion Review

Front

Diffusion is the movement of molecules from...

Back

an area of high concentration to an area of low concentration.

Front

Which means particle transport requires input of energy from the cell? Options: diffusion, active transport, osmosis

Back

active transport

Front

The diffusion of WATER across a selectively permeable membrane is called

Back

osmosis.

Front

An animal cell (think raisin) that is surrounded by fresh water will burst because the osmotic pressure causes

Back

water to move into the cell.

Front

What are the channels and pumps in the cell membrane made of? Options: lipids, carbohydrates, proteins

Back

proteins

Front

When the concentration of molecules on both sides of a membrane is the same, the molecules will

Back

move across the membrane in both directions.

Front

In isotonic solutions...

Back

water moves into and out of the cell equally.

Front

In hypotonic solutions...

Back

water moves into the cell.

Front

In hypertonic solutions...

Back

water moves out of the cell.

Front

Turgor (how straight the plant stands up) is the internal cytoplasmic pressure that results from the amount of water absorbed by plant cells. A plant with the least amount of turgor pressure will stand straight up or limp?

Back

Limp