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Set 1
Physiology week 1-6
| Term | Definition |
|---|---|
| Homeostasis | refers to stability, balance, or equilibrium within a cell or the body. It is an organism's ability to keep a constant internal environment, |
| Tissue | A group of similar cells that perform a common function. |
| Intracellular control | Mechanisms operate at the cell level. These mechanisms regulate function within the cell, often by means of genes and enzymes. |
| Intrinsic control | Mechanisms operate at the tissue and organ levels. Also called local control or autorefulation, intrinsic mechanisms often make use of chemical signals. |
| Extrinsic control | "outside" control and operates at the system and organism levels. Extrinsic control usually involves nervous and endocrine (hormonal) regulation. |
| Semipermeable membrane | allows water to pass through the membrane, but blocks the passage of at least one solute. |
| Metabolism | The chemical reactions that occur in the body. |
| Catabolism | The kind of metabolism that breaks down molecules, usually nutrient molecules, and thereby releases energy from the broken molecules. |
| Anabolism | The kind of metabolism that builds large, complex molecules from smaller ones. |
| Catalyst | A chemical that reduces the amount of activation energy needed to start a chemical reaction. |
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