a logical procedure for gathering information about the natural world, in which experimentation and observation are used to test hypotheses.
a proposal intended to explain certain facts or observations
An explanation supported by many tests and accepted by a general consensus of scientists.
Group exposed to the manipulated variable in an experiment.
The group that does not receive the experimental treatment.
A substance that has no pharmacological effect but administered as a control in testing, experimentally or clinically.
Evidence; information gathered from observations
Number of data points evaluated in the experiment.
Scientific Method Steps
Identify the Problem- Form a Hypothesis- Create an Experiment- Preform an Experiment- Analyze Data- Communicate results.
Reasoning from detailed facts to general principles.
Reasoning from the general to the specific.
a quantity that can assume any of a set of values
A statistical statement of how likely it is that an obtained result occurred by chance.
Characteristics of Life
1) respond to external stimuli
2)-4) alter, sense, and adapt to the environment
5) use energy
7) contain materials only found in living organisms
9) high degree of organization
High Degree of Organization
4) organ systems
Stable conditions within the body; regardless of changes in the outside environment.
a classification of organisms into groups based on similarities of structure or origin etc
A cycle of events in which the status of a body condition is monitored, evaluated, changed, remonitored, reevaluated, and so on.
Negative Feedback System
Reverse a change in a controlled condition.
Positive Feedback System
a process that results in a response that enhances the original stimulus
Natural Organization in Life
Chemical Level > Cellular Level > Tissue Level > Organ Level > Organ System Level > Organism Level
4 Major Tissue Types
group of tissues that work together to perform closely realated functions
a group of organs that work together in performing vital body functions
a living thing that has (or can develop) the ability to act or function independently
The basic unit of all living things
groups of similar cells that perform a specific function in an organism
Global Natural Organization of Life
Individual or Species > Human Population > Biological Community > Ecosystem
Bacteria, archaea, eukarya
Archaebacteria, Eubacteria, Protista, Fungi, Plantae, Animalia
1. Kingdom - Animalia
2. Phylum - Vertebrata
3. Class - Mammalia
4. Order - Primates
5. Family - Hominidae
6. Genus - Homo
7. species - sapiens
Examples of Homeostasis
temperature change, regulation of blood carbon and dioxide level, regulation of blood glucose level