7th Grade: Ch 3 TEST
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25 terms
Terms | Definitions |
|---|---|
 endoplasmic reticulum | connected to the nucleus; pathway to transport materials throughout the cell |
| nucleus | control center of the cell |
| cell membrane | controls what enters and leaves the cell |
| cytoplasm | a watery fluid inside the cell in which the organelles are suspended. |
| lysosome | break down materials such as food and wastes |
| ribosomes | where proteins are made |
| mitochondria | Powerhouse of the cell, organelle that is the site of ATP (energy) production |
| vacuole | membrane covered storage structure for food, water, minerals, waste |
| golgi complex | organelle that modifies, packages, and transports material out of the cell. |
| cell wall | supports and protects the cell; not found in animal cells |
| chloroplast | containing chlorophyll, the site of photosynthesis |
| 2 organelles only in plant cells | cell wall & chloroplast |
| nucleolous | dense darkly staining nuclear body; packaging site for ribosomes |
| cell | basic unit of life |
| tissue | group of similar cells that perform a particular function |
| organ | group of tissues that work together to perform closely related functions |
| organ system | group of organs that work toegther to perform a job |
| organism | a living thing; anything that can carry out life processes independently |
| organelle | A tiny cell structure that carries out a specific function within the cell |
| eukaryote | An organism whose cells have a nucleus |
| prokaryote | A unicellular organism that lacks a nucleus and membrane bound organelles |
| Robert Hooke | was the first scientist to use the term cell to describe the structures which make up cork |
| Anton van Leeuwenhoek | Who was the first to see living cells? |
| Cell Theory | idea that all living things are composed of cells, cells are the basic units of structure and function in living things, and new cells are produced from existing cells |
| organization of living things | Cell-Tissue-Organ-Organ System-Organism |
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