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test vocab.
| Word | Definition |
|---|---|
| Cell | the basic unit of structure and function in all living things |
| Microscope | an optical instrument used for viewing very small objects |
| Organelle | any of a number of organized or specialized structures within a living cell. |
| Cell Wall | a layer around a plant cell (protects and supports the cell) |
| Cytoplasm | a gel-like fluid that moves nutrients,proteins,and organelles within a cell |
| Nucleus | the brain of the cell (direct the cells activities) |
| Mitochondria | the powerhouse of the cell (converts energy in food to energy used by a cell) |
| Chloroplast | an organelle in green plants (creates food for a plant cell using energy from sunlight) |
| Vacuole | a storage for a cell (stores water,food,waste products, and other materials) |
| Selectively Permeable | some substances can cross the membrane while others cannot |
| Diffusion | the process by which molecules move from an area of higher concentration to lower concentration |
| Osmsosis | the diffusion of water molecules across a selectively permeable membrane |
| Endocytosis | a form of active transport |
| Exocytosis | a form of active transport |
| Cell Cycle | sequence of events in which the cell grows,prepares for division,and divides to form two daughter cells |
| Interphase | the first stage of the cell cycle |
| Replication | a process in which the cell makes a cope of the DNA in its nucleus before cell division |
| Mitosis | when the cell's nucleus divides into two new nuclei and one set of DNA is distributed into each daughter cell |
| Cytokinesis | the final stage of the cell cycle |
| Tissue | a group of similar cells that perform the same function |
| Organ | a body structure composed of different tissues that work together |
| Organ System | a group of organs that work together |
| Stimulus | any change or signal in the environment that can make an organism react in some way |
| Response | an action or change in behavior that occurs as a result of a stimulus |
| Gland | organs that produce and release chemicals |
| Hormone | the chemical produced by an endocrine |
| Stress | a reaction of a person's body to potentially threatening,challenging, or disturbing events |
Created by:
ed07129
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