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Ch 3 G.H. Biology
Guest Hollow Biology Chapter 3 vocab
| Term | Definition |
|---|---|
| cytoplasm | all of the material inside the plasma membrane of a cell (excluding organelles) |
| eukaryote | organism that has cells containing a nucleus and other organelles |
| eukaryotic cell | cell that contains a nucleus and other organelles |
| nucleus (plural, nuclei) | organelle inside eukaryotic cells that contains most of the cell’s DNA and acts as the control center of the cell |
| organelle | structure within the cytoplasm of a cell that is enclosed within a membrane and performs a specific job |
| plasma membrane | thin coat of lipids (phospholipids) that surrounds and encloses a cell |
| prokaryote | single-celled organism that lacks a nucleus |
| prokaryotic cell | cell without a nucleus that is found in single-celled organisms |
| ribosome | organelle inside all cells where proteins are made |
| virus | tiny, nonliving particle that contains DNA but lacks other characteristics of living cells |
| ATP (adenosine triphosphate) | energy-carrying molecule that cells use to power their metabolic processes |
| cell wall | rigid layer that surrounds the plasma membrane of a plant cell and helps support and protect the cell |
| central vacuole | large saclike organelle in plant cells that stores substances such as water and helps keep plant tissues rigid |
| chloroplast | organelle in the cells of plants and algae where photosynthesis takes place |
| cytoskeleton | structure of filaments and tubules in the cytoplasm that provides a cell with an internal framework |
| endoplasmic reticulum | organelle in eukaryotic cells that helps make and transport proteins |
| Golgi apparatus | organelle in eukaryotic cells that processes proteins and prepares them for use both inside and outside the cell |
| mitochondria | organelle in eukaryotic cells that makes energy available to the cell in the form of ATP molecules |
| phospholipid bilayer | double layer of phospholipid molecules that makes up a plasma membrane |
| vacuole | large saclike organelle that stores and transports materials inside a cell |
| vesicle | small saclike organelle that stores and transports materials inside a cell |
| active transport | movement of substances across a plasma membrane that requires energy |
| diffusion | type of passive transport that does not require the help of transport proteins |
| endocytosis | type of vesicle transport that moves substances into a cell |
| exocytosis | type of vesicle transport that moves substances out of a cell |
| facilitated diffusion | diffusion with the help of transport proteins |
| osmosis | diffusion of water molecules across a membrane |
| passive transport | movement of substances across a plasma membrane that does not require energy |
| sodium-potassium pump | type of active transport in which sodium ions are pumped out of the cell and potassium ions are pumped into the cell with the help of a carrier protein and energy from ATP |
| transport protein | protein in a plasma membrane that helps other substances cross the membrane |
| vesicle transport | type of active transport in which substances are carried across the cell membrane by vesicles |