click below
click below
Normal Size Small Size show me how
Bio12-Un1-Ch1-LesB
Cell Structure & Function
| Question | Answer |
|---|---|
| cytoskeleton | internal framework of the cell made of microtubules, actin filaments, and intermediate filaments |
| Golgi apparatus/body | structures made of groups of flattened sacs used to store, package, and export proteins and other materials produced in the cell |
| lysosome | lysosomes are vesicles filled with hydrolytic enzymes that help to digest food or break down old structures for recycling or removal |
| matrix | the inner fluid space in the mitochondria; contains DNA, ribosomes, and enzymes that break down carbohydrates to provide energy needed to produce ATP during cellular respiration |
| nuclear envelope | contains nuclear pores; controls the movement of materials into and out of the nucleus |
| nuclear pore | opening in the nuclear envelope that permits the passage of proteins into the nucleus and ribosomal subunits out of the nucleus |
| nucleolus | the dark, spherical area of the nucleus; aids in the production of rRNA (ribosomal RNA), a structural component of ribosomes |
| organelles | subcellular structures surrounded by membranes |
| polysomes | string of ribosomes simultaneously translating regions of the same mRNA strand during protein synthesis; also called polyribosome |
| ribosomes | structures found on rough ER (some are free floating) that assemble proteins |
| rough endoplasmic reticulum (RER) | a network of tubular membranes within the cytoplasm of the cell, occurring either with a smooth surface (smooth endoplasmic reticulum) or studded with ribosomes (rough endoplasmic reticulum), involved in the transport of materials |
| smooth endoplasmic reticulum | a network of tubular membranes within the cytoplasm of the cell, occurring either with a smooth surface (smooth endoplasmic reticulum) or studded with ribosomes (rough endoplasmic reticulum), involved in the transport of materials |
| vacuoles | a membrane-enclosed storage structure that is usually filled with water and chemicals |
| vesicle | vesicles are small vacuoles used to transport materials |
| plasma membrane | a thin membrane (a double layer of lipids) enclosing the cytoplasm of a cell |
| eukaryotes | Cells that have a nucleus. Eukaryotic cells are the structural units of animals. |
| prokaryotes | Cells that do not contain a nucleus |
| CELL THEORY STATES | all organisms are composed of one or more cells cells are the basic units of structure and function in living organisms all cells come from previously existing cells |