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Cell Structure 2
| Question | Answer |
|---|---|
| What is the cell membrane? | A flexible barrier that surrounds cells |
| What is the cell wall? | A strong supporting layer around the membrane |
| What is the lipid barrier? | The compostion of nearly all cell membranes that is a double layered sheet |
| What is concentration? | The mass of a solute in a given volume of a solution |
| What is diffusion? | When particles tend to move from an area where there is more concentration to an area where there is less concentration |
| What is the equilibrium? | When the concentration of a solute is the same throughout a system |
| What is osmosis? | The diffusion of water through a slectively permeable membrane |
| What is isotonic? | When two solutions are the same strength |
| What is hypertonic? | When one soluton is stronger than the other |
| What is hypotonic? | When one solution is weaker than the other |
| what is facilitated diffusion? | Molecules that cannot diffuse across the cell membrane's lippid bilayer on their own move through protein channels instead |
| What is active transport? | when cells move materials against a concetration difference |
| what is endocytosis? | the process of taking material in to the cell by means of infoldings of the cell membrane |
| What is phagocytosis? | When extensions of a cytoplasm surround a particle and package it within a food vacuole |
| Whta is pinocytosis? | When tiny pockets form along the cell membrane, filled with liquid, and pinch of to form vacuoles within the cell |
| What is exocytosis? | when many cells also release large amounts of material from the cell |
| WhAT IS CELL SPECIALIZATION? | When cells throughout an organism can develop in different ways to perform different tasks |
| What is an organ? | When many groups of tissue work together |
| What is an organ system? | A group of organs that work together to perform a specific function |
| What is tissue? | A group of similar cells that perform a particular function |