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ajh science exam 7th
| Question | Answer |
|---|---|
| what is a cell membrane? | protective outer covering of all cells that is made up of a double layer of fat like molecules and regulates the interaction between the cell and the enviroment |
| what is cytoplasm? | constantly moving, gel-like mixture inside the cell membrane that comtains heredity materials |
| what is a cell wall? | rigid structure that encloses, supports, and protects the cell of plants |
| what is an organelle? | structure in the cytoplasm of a eukaryotic cell that can act as a storage site, processes enrgy, move materials, or manufacture substances |
| what is a nucleus? | organelle that controls all the activities of a cell and contains hereditary material made of proteins and D.N.A |
| what is cholorplast? | green,chlorophyll-contained, plant cell organelle that converts sunlight, carbondioxide, and water into sugar |
| what is a mitochondrion? | cell organelle that breaks down lipids and carbonhydrates and releases energy |
| what is a ribosome? | small structure in which cells make their own protein |
| what is E.R.? | cytoplasmic organelle that moves materials around in a cell and is made up of a complex series of folded membranes |
| what is a glogi body? | organell that packages cellular materials and transports them within the cell or out of it |
| what is a tissue? | a group of similar cells that work together to do one job |
| what is a organ? | structure, such as teh heart, made up of different types of tissue that all work together |
| what is the cell theory? | states that all organisms are amde up of one or more cells, the cell is the most basic unit of life, and all the cells come from other cells |
| what is a virus? | a strand of hereditary material surrounded by a protein coating |
| what is a host cell? | living cell in which a virus can actively reproduce or in which a virus can hide until activated by enviromental stimuli |
| what is a mixture? | a combination of substances in which individual substances retain their own properties |
| what is a organic compound? | contains carbon and hydrogen and usally are associated with living things |
| what is a enzyme? | regulates nearly all chemical reactions in a cell |
| what is a inorganic compound? | are made from elements other than carbon |
| what is passive transport? | the movement of substances through the cell membrane without the input of energy |
| what is diffusion? | random movement of molecules from an area where there is relatively more of them into an area where there is relatively fewer of them |
| what is equilibruim? | reached and diffusion stops |
| what is osomosis? | diffusion of water through a cell membrane |
| what is active transport? | an input of energy is required to move materials through a cell membrane |
| what is endocytosis? | process of taking substances into a cell by surronding it with a cell membrane |
| what is exocytosis? | contains a vesicel may be released by the cell |
| what is a metabolism? | total of all chemical reactions in an organism |
| what is photosynthesis? | producers use light energy to make sugars, which can be used as food |
| what os respiration? | chemical reactions occur that break down food molecules into simpler substances and release their stored energy |
| what is fermentation? | to release some of the energy stroed in glucose molecules |
Created by:
marcrobertdillon
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