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vocab 4
| Term | Definition |
|---|---|
| cell membrane | the semipermeable membrane surrounding the cytoplasm of a cell. |
| cytoplasm | the material or protoplasm within a living cell, excluding the nucleus. |
| nucleus | a membrane-enclosed organelle found in eukaryotic cells. Eukaryotes usually have a single nucleus |
| nucleous | a small dense spherical structure in the nucleus of a cell during interphase. |
| Nuclear membrane | A nuclear membrane, also known as the nuclear envelope, is the lipid bilayer membrane which surrounds the genetic material and nucleolus in eukaryotic cells. |
| endoplasmic reticulum | a network of membranous tubules within the cytoplasm of a eukaryotic cell, continuous with the nuclear membrane. It usually has ribosomes attached and is involved in protein and lipid synthesis |
| ribosomes | a minute particle consisting of RNA and associated proteins, found in large numbers in the cytoplasm of living cells. They bind messenger RNA and transfer RNA to synthesize polypeptides and proteins. |
| mitochondria | an organelle found in large numbers in most cells, in which the biochemical processes of respiration and energy production occur. It has a double membrane, the inner layer being folded inward to form layers (cristae). |
| golgi body | a complex of vesicles and folded membranes within the cytoplasm of most eukaryotic cells, involved in secretion and intracellular transport. |
| centriole | a minute cylindrical organelle near the nucleus in animal cells, occurring in pairs and involved in the development of spindle fibers in cell division. |
| Vacuole | A cavity within the cytoplasm of a cell, surrounded by a single membrane and containing fluid, food, or metabolic waste. |
| lysosome | an organelle in the cytoplasm of eukaryotic cells containing degradative enzymes enclosed in a membrane. |
| peroxisomes | a small organelle that is present in the cytoplasm of many cells and that contains the reducing enzyme catalase and usually some oxidases. |
| chloroplast | a plastid that contains chlorophyll and in which photosynthesis takes place |
| cell wall | a rigid layer of polysaccharides lying outside the plasma membrane of the cells of plants, fungi, and bacteria. In the algae and higher plants, it consists mainly of cellulose. |
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sherton14
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