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vocab 6

TermDefinition
autotroph An organism capable of synthesizing its own food from inorganic substances using light or chemical energy.
hetertroph an organism deriving its nutritional requirements from complex organic substances.
chemoautotrophs an organism, typically a bacterium, that derives energy from the oxidation of inorganic compounds.
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 unit used to measure energy released by food
energy power derived from the utilization of physical or chemical resources, especially to provide light and heat or to work machines.
ingestion taking in of a substance,
digestion the process of breaking down food by mechanical and enzymatic action in the alimentary canal into substances that can be used by the body.
egestion the discharge or expulsion of undigested material (food) from a cell in case of unicellular organisms, and from the digestive tract via the anus in case of multicellular 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 spreading of something more widely.
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 a condition in which there is difficulty in emptying the bowels, usually associated with hardened feces.
enzyme a substance produced by a living organism that acts as a catalyst to bring about a specific biochemical reaction.
macromolecules a molecule containing a very large number of atoms, such as a protein, nucleic acid, or synthetic polymer.
bulimia an emotional disorder involving distortion of body image and an obsessive desire to lose weight, in which bouts of extreme overeating are followed by depression and self-induced vomiting, purging, or fasting.
anorexia an emotional disorder characterized by an obsessive desire to lose weight by refusing to eat.
Created by: sherton14