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HB: Chapter 1

Biology Branch of science that studies life
Metabolism The sum of all chemical reactions within an organism. All include the transformation of energy and molecules.
Homeostasis Relatively constant levels maintained by life functions with in an organism. 'Maintenance of a constant internal environment'.
Cell The smallest form of life that carries out all life functions.
Photosynthesis Conversion of carbon dioxide into sugar. Stores solar energy.
Tissue An association of cells with the same general structure and function. (Stratified Squamous)
Organ An association of several tissue types that carry out a specific function. (Stomach, Heart)
Organ System Two or more organs that work together to carryout a general function (digestion, circulation)
Scientific Method A system used to gain reliable information about a phenomenon.
Hypothesis A statement (not question) that predicts how a condition will affect an outcome.
Independent Variable The condition predicted to cause a change
Dependent Variable The measurable change (outcome)
Control Group Normal treatment. Group that doesn't receive independent variable treatment.
Experimental Group Altered treatment. Group that receives the condition being tested.
Placebo In order to remove bias, it appears to be part of experiment but is lacking condition to be tested. Participant cannot distinguish between the true condition tested and the fake. Example: Cancer drug in pink pill vs Sugar in pink pill.
Theory A broad explanation of a phenomenon based on extensive and consistent evidence. Gravity, Pate Tectonics, Evolution, Climate Change.
Skepticism Critical thinking skill that centers around a questioning attitude. Not to be confused with contrarian.
Variables Conditions that may have an effect on the outcome of an experiment (patient age, BMI, genetics, general health).
Created by: dmainvil



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