Cell & Membrane Structures
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Created by:
SquiresIBbiology on November 17, 2009
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20 terms
Terms | Definitions |
|---|---|
 Cell Wall | a thin membrane around the cytoplasm of a plant cell |
| Plasma Membrane | thin outer boundary of a cell that regulates the traffic of chemicals between the cell and its surroundings |
| Cytoplasm | a jellylike fluid inside the cell in which the organelles are suspended |
| Pili | Attachment structures on the surface of some prokaryotes |
| Flagella | whiplike tails found in one-celled organisms to aid in movement |
| Ribosome | small particle in the cell on which proteins are assembled; made of RNA and protein |
| Nucleoid | A dense region of DNA in a prokaryotic cell. |
| Rough ER | That portion of the endoplasmic reticulum studded with ribosomes. |
| Lysosome | cell organelle filled with enzymes needed to break down certain materials in the cell |
| Golgi Apparatus | stack of membranes in the cell that modifies, sorts, and packages proteins from the endoplasmic reticulum |
| Mitochondrion | an organelle containing enzymes responsible for producing energy |
| Nucleus | a part of the cell containing DNA and RNA and responsible for growth and reproduction |
| Phosholipid Bilayer | a two-layered arrangement of phosphate and lipid molecules that form a cell membrane, the hydrophobic lipid ends facing inward and the hydrophilic phosphate ends facing outward. |
| Cholesterol | steroid molecule present in the plasma membranes of animal cells |
| Integral Protein | A protein imbedded in the bilayer of the cell membrane |
| Peripheral Protein | a protein appendage loosely bound to the surface of a membrane and not embedded in the lipid bilayer |
| Plasma Membrane | thin outer boundary of a cell that regulates the traffic of chemicals between the cell and its surroundings |
| Prokaryotes | cells that do not contain nuclei |
| Eukaryotes | cells that contain nuclei |
| Endoplasmic Reticulum | an internal membrane system in which components of cell membrane and some proteins are constructed |
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