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Sookdeo-Cells
Characteristics of Cells
Term | Definition |
---|---|
cell | smallest structure and functional unit of all living organisms |
organism | any living thing |
cell membrane | a protective lipid bilayer that covers the cell's surface and act as a barrier between the inside of the cell and the cell's environment "outside of the cell" |
cytoplasm | enclosed by the cell membrane and holds the fluid and all organelles "jelly like" |
organelle | small body in the cell's cytoplasm that has a special function "parts of a cell" |
nucleus | membrane bound organelle that contains the DNA "controls the cell", codes for making protein |
prokaryote | single celled organism that does not have a nucleus |
eukaryote | an organism made of cells with DNA in the nucleus (examples are plants, animals, protist and fungi) |
cytoskeleton | network of protein that gives shape and support to the cell |
mitochondrion | release energy stored in food “power house”; has its own DNA |
ribosome | makes protein in prokaryotes and eukaryotes; small particles of RNA |
endoplasmic reticulum | transport of protein; assembles for the release; rough ones have ribosomes attached |
Golgi complex or apparatus | modifies, sort and package for distribution of proteins |
cell wall | provide support and protect plant cell, not in animal cell |
vacuole | fluid filled vesicle found in animals, plants and fungi used for storage; stores water, salts, protein and carbohydrates; plants have a large central vacuole |
chloroplast | organelles where photosynthesis occurs; captures energy from sunlight and converts to photosynthesis |
lysosome | break down worn out or damaged organelles, waste and foreign invaders; breaks down lipids, carbohydrates and protein into smaller molecules |
structure | arrangements of parts in an organism or object (how it is built) |
function | activity of each part in the organism (what does it do) |
photosynthesis | the process where plants, algae and some bacteria gets energy |
cellular respiration | process where cells use oxygen to produce energy from food |
mitosis | the process for cell division in a eukaryotic cell |
passive transport | movement of particles across a cell membrane without energy |
active transport | movement of particles against a concentration gradient using energy |
diffusion | movement of molecules from high concentration to low concentration (passive transport) |
osmosis | the diffusion of water (passive transport) |
endocytosis | cell surround a particle to bring it into the cell using energy |
exocytosis | a vessicle from inside the cell attach to the cell membrane to move "stuff" out of the cell using energy |
equilibrium | when there is a balance of the molecules |
concentration gradient | there is an uneven distribution of a substance across a border. For example, think of a balloon. The air inside the balloon is more concentrated than the air outside of it. There is a concentration gradient because of the differences in concentration |