Human Biology
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28 terms
Terms | Definitions |
|---|---|
 Cell | An organized unit that can survive and reproduce by itself, using energy, necessary raw materials and DNA instructions |
| Homeostasis | A state of overall internal chemical and physical stability that is required for survival of cells and the body as a whole |
| Characteristics of Life | 1. Living things take in and use energy and materials 2. Living things sense and respond to changes in the enviornment 3. Living things consist of one or more cells 4. Living things maintain homeostasis 5. Living things reproduce and grow |
| Primates | Distinct group of mammals that includes humans, apes, and their close relatives |
| Vertebrate | An animal that has a backbone |
| Biosphere | All parts of the Earth's waters, crust, and atomosphere in which organisms live |
| Atom | The smallest unit of matter that is unique to a particular element |
| Molecule | Unit of matter in which chemical bonding holds together two or more atoms of the same or different elements |
| Tissues | Group of cells and intercellular substances that function together in one or more specialized tasks |
| Organ | Body structure of definite form and functions that is composed of more than one tissue |
| Organ systems | Two or more organs that interact chically, physically, or both in performing a common task |
| Organism | a living thing that has (or can develop) the ability to act or function independently |
| Population | A group of individuals of the same species occupying a given area |
| Community | The population of all species occupying a habbit; also applied to groups of organisms with similar lifestyles in a habit |
| Ecosystem | An array of organisms and their physical environment, all of which interact through a flow of energy and a cycling of materials |
| Scientific Method | Any systematic ways of obtaining information about the natural world |
| Scientific Method Steps | 1.Observe some aspect of nature 2. Ask a question about the observation or identify a problem to explore 3. Develope a hypothesis 4. Make a prediction 5. Test prediction 6. Repeat the tests or develop new ones 7. Analyze and report the test results and conclusions |
| Control Group | A group that differs from the experimental group only with respect to the variable being studied |
| Experiment | A test in which some phenomenon in the natural world is manipulated in controlled ways to gain insight into its function, structure, operation, or behavior |
| Hypothesis | A possible explanation of a specific phenomenon |
| Sampling Error | Error that develops when an experimenter uses a sample of a population for an experimental group that is not large enough to be representative of the whole |
| Variable | The only factor that is not the same in the experimental group as it is in the control group |
| Critical Thinking | Objective evaluation of information |
| Fact | Verifiable information, not opinion or speculation |
| Opinion | A subjective judgment |
| Scientific Theory | A systematic tested explantion of a broad range of natural events and observations |
| Antibiotic | A substance that kills or inhibts the growth of microogranisms |
| Emerging Diseases | Diseases caused by a new strain of an existing pathogen or one that is now explotting an increased availability of human hosts |
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