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28 terms

Human Biology

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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