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13 Cards in this Set

  • Front
  • Back
characteristics of life
respond to external stimuli,
alter the environment,
sense the env.,
use energy,
contain materials only in living orgs.,
constant internal env. (homeostasis),
high degree of organization
negative feedback/feedback loop
a feedback loop, eliminate the changes detected by the stimulus receptor...prevents you from breathing so fast you pass out...etc
A negative feedback loop is one that tends to slow down a process, while the positive feedback loop tends to accelerate it.

feedback loop::
::the system requires a stimulus receptor that monitors the env., a control center to get signal from receptor, and effectors to carry out the response
hierarchy of organization of life
1: chemical level (parts of cells)
2: cellular level: smallest unit of life
3:tissue level: similar cells together
4:organ level:assemblage of tissues
5: organ system level: organs that carry out generalized functions
6: organism level
The 6 Kingdoms
Animalia, Plantae, Fungi, Protista, Eurobacteria, and Archaebacteria
Kingdoms divided into smaller groups:
phylum, class, order, family, genus, species
capable of remaining alive
steps to the Scientific Method
recognize problem, develop a hypothesis, test hypothesis, analyze and interpret the data to reach conclusions, conclude and share info with the scientific community
inductive reasoning
creating a general statement from our observations
deductive reasoning
moving from the general hypothesis to a specific situation
statistical significance
an experimental result that would occur by chance in less than 1 experiment in 20; the accepted level in modern science
putting the needs of others ahead of, or equal to, personal needs:: usually only happens with humans
organisms that maintain an internal temperature within a narrow range despite environmental conditions (snowhare thermoregulates--restricts blood flow to reduce heat loss through their extremeties)
the transfer of heat from a warm body to the surrounding atmosphere