| A | B |
|---|
| the movement of a substance from an area of high concentration to an area of low concentration | diffusion |
| a tea bag is symbolic for a | cell's membrane |
| tea in the bag moves from __ concentration to ___. | low to high |
| All cells contain ___ | water |
| diffusion of water across the cell membrane is called ___ | osmosis |
| osmosis and diffusion are both __ types of transport | passive |
| passive transport __ require cell energy | do not |
| When a substance disolves in water, the concentration of water in the solution ___. | decreases |
| So that cells do not explode, cells have the ___ concentration as your body fluids. | same |
| All things that pass in or out of a cell must go through the cell ___. | membrane |
| When a substance can pass freely in and out of the cell, the membrane is __. | permeable |
| When a cell membrane acts as barrier, the cell membrane is considered ___. | impermeable |
| Some cells allow certain substances in while keeping out others are called. | selectively permeable |
| Cell membranes are made of ___ layers of lipid molecule.s | two |
| Materials pass into the cell as the lipid molecules ___ past each other | slip |
| __ molecules have specific job that allows protein molecules in. | Carrier |
| Carrier molecules bring larger molecules from one side of the ___ to the other. | membrane |
| Carrier molecules can only help one to two molecules ___ the cell membrane | across |
| When a substance moves from high concentration to low concentration uses ___ transport. | active |
| Active transport involves ___. | energy |
| Freezing of human tissue without destroying the tissue is called ___. | cyrobiology |
| In cyrobiology, the tissue is cooled at a very low temperature & the water is removed from the cell. This is called ___ | dehydrating |
