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Biology Ch. 3
Biology test
| Question | Answer |
|---|---|
| Active Transport | energy required....moves molecules across a cell... they move from higher concentration to lower concentration |
| whats the cell membrane | Made of two layers of phospholipids... surrounds cell from environment....controls the amount of material in and out of the cell |
| cell theory | theory all organisms are made of cells... cells produced by other cells... basic unit of life |
| cell wall | rigid structure that gives protection,support, and shape of cell |
| centriole | small cylinder shaped organelles made of protein tubes shaped in a circle |
| chloroplast | gives energy to cell& color |
| concentration gradient | the difference in concentration from one location to the other |
| cytoplasm | jelly like substance inside cells that has molecules and some organelles |
| cytoplasm | network of proteins like microtubes |
| Active Transport | energy required....moves molecules across a cell... they move from higher concentration to lower concentration |
| whats the cell membrane | Made of two layers of phospholipids... surrounds cell from environment....controls the amount of material in and out of the cell |
| cell theory | theory all organisms are made of cells... cells produced by other cells... basic unit of life |
| cell wall | rigid structure that gives protection,support, and shape of cell |
| centriole | small cylinder shaped organelles made of protein tubes shaped in a circle |
| chloroplast | gives energy to cell& color |
| concentration gradient | the difference in concentration from one location to the other |
| cytoplasm | jelly like substance inside cells that has molecules and some organelles |
| cytoskeleton | network of proteins like microtubules and microfilaments, inside a eukaryotic cell that supports and shapes the cell |
| diffusion | movement of dissolved molecules in a fluid or gas from a region of higher concentration to an area of lower concentration |
| endocytosis | uptake of liquids or large molecules into a cell by inward folding of the cell membrane |
| endoplasmic reticulum | interconnected network of thin, folded membranes that produce, process, and distribute proteins |
| eukaryotic cell | cell that has a nucleus and other membrane-bound organelles |
| exocytosis | release of substances out of a cell by the fusion of a vesicle with the membrane |
| facilitated diffusion | diffusion of molecules assisted by protein channels that pierce a cell membrane |
| fluid mosaic model | arrangement and movement of the molecules make up a cell membrane |
| Golgi apparatus | stack of flat, membrane enclosed spaces containing enzymes that process, sort, and deliver proteins or the mail man |
| hypertonic | solution that has a higher concentration gets smaller like hyper person sweating out liquid |
| hypotonic | solution that has a lower concentration of gets bigger |
| isotonic | solution that has an equal concentration |
| lysosome | like trash can |
| mitochondrion | (plural mitochondria) bean shaped organelle that supplies energy to the cell and has its own ribosomes and DNA |
| nucleus | (plural nuclei) organelle composed of a double membrane that acts of the storehouse for most of the cell's DNA |
| organelle | membrane bound structure that is specialized to perform different functions within a cell |
| osmosis | diffusion of water molecules across a semipermeable membrane from an area of higher water concentration to an area of lower water concentration |
| passive transport | movement of molecules across the cell membrane without energy input from the cell |
| phagocytosis | uptake of a solid particle into a cell by engulfing the particle; see endocytosis |
| phospholipid | molecule forming a double layered cell membrane; consists of a glycerol, a phosphate group and two fatty acids |
| prokaryotic cell | cell without a nucleus or membrane-bound organelles |
| receptor | protein that detects a signal molecule and performs an action in response |
| ribosome | organelle that links amino acids together to form proteins |
| selective permeability | condition or quality of choosing what crosses a barrier or membrane |
| vacuole | organelle used to store materials such as water, food, or enzymes needed by the cell |
| vesicle | moves stuff around in a cell |