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Autotrophs
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nutrition vocabulary
| Term | Definition |
|---|---|
| Autotrophs | is an organism that produces complex organic compounds from simple substances present in its surroundings, generally using energy from light or inorganic chemical reactions. |
| Heterotrophs | an organism deriving its nutritional requirements from complex organic substances. |
| Chemoautotrophs | organisms that obtain energy by the oxidation of electron donors in their environments. |
| Photoautotrophs | any organism that derives its energy for food synthesis from light and is capable of using carbon dioxide as its principal source of carbon. |
| calories | either of two units of heat energy. |
| energy | he property that must be transferred to an object in order to perform work on, or to heat, the object. |
| ingestion | the process of taking food, drink, or another substance into the body by swallowing or absorbing it. |
| digestion | the breakdown of large insoluble food molecules into small water-soluble food molecules so that they can be absorbed into the watery blood plasma. |
| egestion | the discharge of undigested food in the Digestive tract for multicellular organisms and is done on the surface of the cell in unicellular organisms. |
| Roughage | fibrous indigestible material in vegetable foodstuffs that aids the passage of food and waste products through the gut. |
| Cellulose | an insoluble substance that is the main constituent of plant cell walls and of vegetable fibers such as cotton. It is a polysaccharide consisting of chains of glucose monomers. |
| body mass index | a weight-to-height ratio, calculated by dividing one's weight in kilograms by the square of one's height in meters and used as an indicator of obesity and underweight. |
| Absorption | the process or action by which one thing absorbs or is absorbed by another. |
| Diffusion | the intermingling of substances by the natural movement of their particles. |
| villi | any of numerous minute elongated projections set closely together on a surface, typically increasing its surface area for the absorption of substances, in particular. |
| constipation | bowel movements that are infrequent or hard to pass |
| enzyme | macromolecular biological catalysts. |
| marcomolecules | a molecule containing a very large number of atoms, such as a protein, nucleic acid, or synthetic polymer. |
| Bulimia | A serious eating disorder marked by binging, followed by methods to avoid weight gain. |
| Anorexia | An eating disorder causing people to obsess about weight and what they eat. |
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