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Introduction toCells
| Question | Answer |
|---|---|
| cell | The basic unit of structure and function of living things. |
| microscope | An instrument that makes small objects appear larger. |
| cell theory | A wildly 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 layer that surrounds a cell and controls which substances pass into and out of a cell. |
| nucleus | In calls, a large oval organelle that contains the cell's genetic material in the form of DNA and controls many of the cell's activities. The central core of an atom which contains protons and neutrons. the solid inner core of a comet. |
| organelle | A tiny cell 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 of a cell located inside the cell membrane (in prokaryotes) or between the cell membrane and nucleolus(in eukaryotes. |
| mitochondria | Rod shaped organelles that convert energy into food molecules to energy the cells can use to carry out it's functions. |
| endoplasmic reticulum | An organelle that forms a maze of passageways 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 the endoplasmic reticulum, packages them, and distributes them to the other parts of the cell. |
| vacuole | A sac-like organelle that stores food, water, and other materials. |
| chloroplast | An organelle in the cells of plants and some other organisms that captures energy from sunlight and changes it to an energy from that cells can use in making food. |
| lysosome | A call organelle which contains chemicals that break down large food particles into smaller ones and 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 preform a similar function. |
| organ | A body structure that is composed of different kinds of tissues that work together. |
| organ system | A group of organs that work together to preform a major function. |
| element | A pure substance that cannot be broken down into other substances by chemical or physical means. |
| compound | A substance made of two or most elements chemically combined in a specific ratio, or proportion. |
| carbohydrate | An energy-rich organic compound, such as sugar or a starch, that is made of the elements carbon, hydrogen, and oxygen. |
| lipid | An energy-rich organic compound, such as fat, oil, or wax, that is made of the elements carbon, hydrogen, and oxygen. |
| protien | Large organic molecule of carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur. |
| enzyme | A type of protein that speeds up a chemical reaction in a living thing. A biological that lowers the activation energy or reactions in cells. |
| nucleic acid | A very large organic molecule made of carbon, hydrogen, oxygen, nitrogen, and something phosphorous, that contains the instructions cells need to carry out all the 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 a DNA molecule. |
Created by:
Zsmith380