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Chapter 1
cell structure and function
| Question | Answer |
|---|---|
| diffusion | the process by which small molecules move across the cell membrane molecules move from a higher area of concentration to an area of lower concentration |
| osmosis | the diffusion of water molecules through a selectively permeable membrane |
| passive transport | the movement of materials through a cell membrane without using cellular energy |
| active transport | the movement of materials through a cell membrane using cellular energy |
| selectively permeable | some substances can pass through the cell membrane while others can't |
| cell | the basic unit of structure and function i living things |
| microscope | an instrument that makes small objects look larger |
| cell theory | states:-all living things are composed of cells -cells are the basic units of structure and function in living things -all cells are made of cells |
| organelles | carry out specific functions and within cells |
| cell wall | a layer of nonliving material that protects and holds up a plant cell |
| cell membrane | a barrier after the cell wall that lets certain things in and out of the cell |
| nucleus | the "brain" of the cell that is a large oval structure |
| cytoplasm | the region between the cell wall and the nucleus |
| mitochondria | converts energy into food for the cell; powerhouses of cells |
| endoplasmic reticulum | carries out proteins and other materials through the cell wall |
| ribosomes | produce proteins |
| Golgi body | receives, packages, and distributes newly formed materials throughout the cell |
| chloroplasts | capture energy from sunlight and use it to make food for the cell |
| vacuole | storage area for cells |
| lysosome | contains chemicals that break down most materials in cells |
Created by:
ghill
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