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HB: Chapter 1
Question | Answer |
---|---|
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). |