Science Chapter 7 Vocabulary
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Created by:
megopego37 on October 27, 2011
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20 terms
Terms | Definitions |
|---|---|
 cell | the basic unit of all form of life |
| cell theory | fundamental concept of biology that states that all living things are composed of cells; that cells are the basic units of structure and function in living things; and that new cells are produced from existing cells. |
| cell membrane | thin, flexible barrier that surrounds all cells; regulates what enters and what leaves the cell. |
| nucleus | the center of an atom, which contains the protons and neutrons/ the structuure that contains the cell's genetic material in the form DNA. |
| eukaryote | organism whose cells contain a nucleus |
| prokaryote | unicellular organism that lacks a nucleus |
| cytoplasm | fluid portion of the cell outside the nucleus. |
| organelle | specialized structure that performs important cellular funtions within a eukaryotic cell. |
| vacuole | cell organelle that materials such as water, salts, proteins, and carbohydrates |
| lysosmome | cell organelle that breaks down lipids, carbs, and proteins into small molecules that can be used by the rest of the cell |
| cytoskeleton | network of protein filaments in eukaryotic cells that give the cell its shape and internal organization and its involved in movement. |
| centriole | structure in an animal cell that helps to organize cell division |
| ribosome | cell organelle conisting of RNA and proteing found throughout the cytoplasm in a cell; the site of protein synthesis |
| endoplasmic reticulum | internal membrane system found in eukaryotic cells, place where lipid components of the cell membrane are assembled |
| golgi apparatus | organelle in cells that modifies, sorts, and packages proteings and other materials from the endoplasmic reticulum for storage in the cell or released outside of the cell. |
| chloroplast | organelle found in cells of plants and some other organisms that captures the energy from sunlight and converts it to chemical energy |
| mitochondria | cell organelle that converts the chemical energy stored in food into compounds that are more convenient for the cells to use. |
| cell wall | strong, supporting layer around the cell membrane in some cells |
| selectively permeable | property of biological membrane that allows some substances to pass across it while others can't; also called semipermeable membrane |
| lipid memebrane | ... |
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