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BIO
Cells
| Question | |
|---|---|
| Prokaryotic cells | simple, no nucleus, unicellular |
| Eukaryotic cells | plant and animal, more complex, usually multicellular, nucleus with membrane bound organelles |
| cell membrane | regulates what goes in and out of cell |
| cell wall | rigid outer layer in plant cells made of cellulose, protects and provides structure |
| cytoplasm | fluid in cell |
| mitochondria | makes energy, converts food energy to chemical energy (ATP) |
| chloroplast | found in plant cells, converts light into energy |
| ribosome | makes protein |
| Endoplasmic reticulum (rough) | rough - dotted with ribosomes, modifies and packages proteins |
| endoplasmic reticulum (smooth) | no ribosomes, makes lysosomes, synthesizes lipids |
| golgi apparatus | modifies, sorts and ships molecules within the cell |
| lysosome | breaks down materials within the cell, digests |
| vacuoles | storage, very large in plant cells |
| vesicle | transports molecules within and in and out of cell |
| passive transport | moves molecules high --> low, no energy required |
| active transport | moves molecules low ---> high, requires ATP (energy) |
| equilibrium | both sides have roughly same amount, molecules diffuse until they reach equilibrium |
| exocytosis | export of bulky molecules, moves them out of cell |
| endocytosis | import of large molecules, moves them into cell |
| osmosis | movement of water, type of passive transport |
| tonicity | the ability of a solution to cause a cell to gain or lose water |
| isotonic | concentration of solution is the same inside and outside the cell |
| hypertonic | there is a higher concentration in the solution outside the cell, the cell will move water OUT and shrink |
| hypotonic | there is a higher concentration in the solution inside the cell, the cell will move water IN and swell |