click below
click below
Normal Size Small Size show me how
unit 4; section 1
structures and functions
| Term | Definition |
|---|---|
| cells | basic unit of all forms of life |
| cell membrane | thin, flexible barrier that surrounds all cells; regulates what enters and leaves the cell |
| nucleus | the center of an atom, which contains the protons and neutrons |
| eukaryotes | organism whose cells contai |
| prokaryotes | unicellular organism that lacks a nucleus |
| cytoplasm | the fluid that fills a cell |
| organelle | specialized structure tat performs important cellular functions within a Eukaryotic cell |
| vacuole | cell organelle that stores materials such as water, salts, proteins, and carbohydrates. |
| lysosome | cell organelle that breaks down lipids, carbs, and proteins into small molecules that can be used by the rest of the cell. |
| cytoskeleten | network of protein filaments in a Eukaryotic cell that gives the cell its shape and internal organization and its involved in movement |
| centrioles | structure in an animal cell that helps cell division |
| ribosomes | cell organelle consisting of RNA and protein found throughout the cytoplasm in a cell |
| endoplasmic reticulum | internal membrane system found in Eukaryotic cells |
| golgi apparatus | organelle in cells that modifies, sorts, and packages proteins and other materials from the endoplasmic reticulum for storage in the cell or release outside the cell |
| chloroplasts | organelle found in cells of plants and some other organisms that capture the energy from the sunlight and coverts it into chemical energy |
| mitochondria | cell organelle that converts the chemical energy stored into food compounds that are more convenient for the cell to use |
| cell wall | strong, supporting layer around the cell membrane in some cells |