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4-3
Cell Organelles and Features
| term | definition |
|---|---|
| phospholipid bilayer | foundation of cell membrane |
| chromosome | structures in the nucleus made of DNA and protein |
| nuclear envelope | double membrane surrounding nucleus |
| nucleolus | denser area in the nucleus |
| ribosome | organelles made of protein and RNA; directs protein synthesis in cytoplasm |
| mitochondrian | tiny organelles that transfer energy from organic molecules to ATP |
| endoplasmic reticulum | system of membranous tubes and sacs (cisternae); like an intercellular highway where molecules move from one part of the cell to another; rough or smooth |
| Golgi apparatus | receive vesicles from the ER containing newly made proteins or lipids |
| lysosome | vesicles that bud from the Golgi complex and contain digestive enzymes |
| cytoskeleton | network of thin tubes and filaments that crisscrosses the cytosol; gives shape to cell |
| microtubule | hollow tubes made of protein (tubulin) |
| microfilament | long threads of the beadlike protein actin and are linked end to end and wrapped around each other; contribute to cell movement like the crawling of white blood cells and the contraction of muscle cells |
| cilium | short hairlike structures on the cell's surface; many in one area |
| flagellum | long hairlike structures on cell's surface; few in one area |
| centriole | consist of two short cylinders of microtubules at right angles to each other and are situated near nuclear envelope |
Created by:
farlowm16
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