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A & P I-Lab 4.1
The Cell: Anatomy and Divison-cyoplasmic Organelles
| Question | Answer |
|---|---|
| Ribosomes | * Tiny spherical bodies composed of RNA and protein: * actual sites of protein synthesis: * Floating free or attached to a membranous structure in the cytoplasm. |
| Endoplasmic reticulum (ER) | *membranous system of tubules that extends throughout the cytoplasm: two varieties ---rough ER is studded with Robosomes, wich provide area for storage and smooth ER, which has no function in protein synthesis. |
| Golgi apparatus | Stack of flattened sacs with bulbous ends and associated small secicles: found close to the nucleus:plays a role in packaging proteins or other substances for export from the cell. |
| Lysosomes | Various-sized membranous sacs containing digestive enzymes: Function is to digest worn-out cell organells and foreign substnces that enter the cell. |
| Peroxisomes | Small lysosome-like membranous sacs conaining oxidase enzymes that detoxify harmful chemicals. |
| Mitcochondria | "Powerhouses of the cell"..Rod shaped bodies that produce ENERGY or ATP |
| Centrioles | Paired, cylindrical bodies lie at right angles to each other, close to the nucleus. For the bases of cilia and flagella |
| Cytoskeletal elelments: Microfilaments: Intermediate filaments: Microtubules: | * Provide cellular support * Function in intracellular transport *Microfilament are formed largely of actin, a contractile protein. Intermediate filament are stable elements to composed of a variety of proteins and resist mechanical forces action on cel |