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Vocabulary #6
Unit 3: Patterns of Cellular Organization
| Question | Answer |
|---|---|
| homeostasis | conditions inside an organism that an organism keeps stable. Example: human body temperature is about 98.6 degrees F. If you get too hot, your body will sweat to maintain. If you get too cold, your body will shiver. |
| diffusion | movement of particles from an area of high concentration to an area of low concentration |
| osmosis | movement of WATER molecules from an area of high concentration to an area of low concentration. |
| passive transport | movement of particles across a membrane by way of osmosis or diffusion. the cell does not use energy for this. |
| active transport | movement of particles across a membrane from low concentration to high concentration (the opposite direction as osmosis & diffusion. The cell has to use energy to do this. |
| tissue | Many cells of the same kind with the same structure and function in the body. Example: epidermis, a layer of cells that are part of the skin (an organ) |
| organ | a group of tissues in the body that perform a life process. Example: The lungs take in oxygen from the air and give off carbon dioxide. |
| organ system | a group of organs that work together to perform a life function. Examples: skeleton, digestive system |
| excretion | The way an organism removes waste or other substances out of the body. Examples: sweating, urinating. |
| unicellular | an organism made of one cell. That cell must perform all life functions. |
| multicellular | an organism made of many cells. The cells are specialized to perform certain functions. |
Created by:
coradesj
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