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Lesson 1-3
| cell | The basic unit of structure and function in living things |
| microscope | An instrument that makes small objects look larger |
| cell theory | A widely accepted explanation of the relationship between cells and living things |
| cell wall | A rigid supporting layer that surrounds the cells of plants and some other organisms |
| cell membrane | A thin, flexible barrier that surrounds a cell and controls which substances pass into and out of a cell. |
| nucleus | In a cells, a large oval organelle that contains the cell's genetic material in the for of DNA and controls many of the cell's activities. The neutrons. The solid inner core of a comet |
| organelle | A tiny structure that carries out a specific function within the cell. |
| ribosome | A small grain-shaped organelle in the cytoplasm of a cell that produces proteins |
| cytoplasm | The thick fluid region of a cell located inside the cell membrane or between the cell membrane and nucleus. |
| mitochondria | Rod-shaped organelles that convert energy in food molecules to energy the cell can use to carry out its function |
| endoplasmic reticulum | An organelle that forms a maze of passageways in which proteins and other materials are carried from one part of the cell to another |
| Golgi apparatus | An organelle in a cell that receives proteins and other newly formed materials from endoplasmic reticulum, packages them, and distributes them to other parts of the cell. |
| vacuole | A sac-like organelle that stores water, food, an other materials. |
| chloroplast | An organelle in the cells of plants and some others organisms that captures energy from sunlight and changes it to energy form that cells can use in making food. |
| lysosome | A cell organelle which contains chemicals that break down large food particle into smaller ones and that can be used by the rest of the cell. |
| multicellular | Consisting of many cells |
| unicellular | Made of a single cell. |
| tissue | A group of similar cells that perform a specific function |
| organ | A body structure that is composed of different kind of tissue that works together |
| organ system | A group organs that work together to perform a major function |
| element | A pure substance that cannot be broken down in other substance by chemical or physical means. |
| compound | A substance made of two or more elements chemically combined in a specific ration, or proportion |
| carbonhydrate | An energy-rich organic compound, such as or a starch, that is made of the elements carbon ,hydrogen, and oxygen |
| lipid | An energy-rich organic compound, such as a fat, oil, or wax, that is made of carbon, hydrogen, and oxygen |
| protein | Large organic molecule made of carbon, hydrogen, oxygen, nitrogen, and sometime sulfur. |
| enzyme | A type of protein that speeds up a chemical reaction in a living thing. A biological catalyst that lowers the activation energy or reaction in cells. |
| nucleic acid | A large organic molecule made of carbon, oxygen, hydrogen, nitrogen, and phosphorus, that contains the instructions cells need to carry out all functions of life |
| DNA | Deoxyribonucleic acid; the genetic material that carries information about an organism and is passed from parent to offspring |
| double helix | The shape of DNA molecule |
Created by:
mvu047