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Chapter 7 vocab
vocabulary words on chapter 7
| Term | Definition |
|---|---|
| cell membrane | thin, flexible barrier around a cell; regulates what enters and leaves the cell |
| cell wall | strong supporting layer around the cell membrane in plants, algae, and some bacteria |
| lipid bilayer | double-layered sheet that forms the core of nearly all cell membranes |
| diffusion | process by which molecules tend to move from an area where they are more concentrated to an area when they are less concentrated |
| equilibrium | when the concentration of solute is the same throughout the solution |
| osmosis | diffusion of water through a selectively permeable membrane |
| isotonic | when the concentrations of two solutions are the same |
| hypertonic | when comparing two solutions, the solution with the greater concentration of solutes |
| hypotonic | when comparing two solutions, the solution with the lesser concentration of solutes |
| facilitated diffusion | movement of specific molecules across cell membranes through protein channels |
| active transport | energy requiring process that moves materials across a cell membrane against a concentration difference |
| endocytosis | process by which a cell takes material into the cell by in-folding of the cell membrane |
| phagocytosis | process in which extensions of cytoplasm surround and engulf large particles and take them into the cell |
| pinocytosis | process by which a cell takes in liquid from the surrounding environment |
| exocytosis | process by which a cell releases large amounts of material |
Created by:
Tyl3r10959
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