NAS2 CHALLENGE EXAM
(SIMPLIFIED SUMMARY)
Scientific Method
a series of steps followed to solve problems including
collecting data, formulating a hypothesis, testing the
hypothesis, and stating conclusions.
Steps of the Scientific Method
observation, hypothesis, experiment, conclusion
Hypothesis
a testable prediction, often implied by a theory
Theory
well-tested explanation that unifies a broad range of
observations
Sample Size
the number of subjects used in an experiment or study
Trials
the number of times an experiment is repeated
Anatomy
the study of body structure
Physiology
the study of the normal functions of living organisms and
their parts
Levels of Scientific Organization
organelle
cells
tissues
organs
, organ systems
organisms
populations
communities
ecosystem
biosphere
Homeostasis
a tendency to maintain a balanced or constant internal
state; the regulation of any aspect of body chemistry, such
as blood glucose, around a particular level
Survival Needs and Functions Necessary for Life
maintaining boundaries
movement
responsiveness
digestion
metabolism
excretion
reproduction
growth
nutrients
oxygen
water
appropriate climate
Components of a Homeostatic Control Mechanism
stimulus
receptor
control center
set point
effector
Homeostatic Control Mechanisms Stimulus
(SIMPLIFIED SUMMARY)
Scientific Method
a series of steps followed to solve problems including
collecting data, formulating a hypothesis, testing the
hypothesis, and stating conclusions.
Steps of the Scientific Method
observation, hypothesis, experiment, conclusion
Hypothesis
a testable prediction, often implied by a theory
Theory
well-tested explanation that unifies a broad range of
observations
Sample Size
the number of subjects used in an experiment or study
Trials
the number of times an experiment is repeated
Anatomy
the study of body structure
Physiology
the study of the normal functions of living organisms and
their parts
Levels of Scientific Organization
organelle
cells
tissues
organs
, organ systems
organisms
populations
communities
ecosystem
biosphere
Homeostasis
a tendency to maintain a balanced or constant internal
state; the regulation of any aspect of body chemistry, such
as blood glucose, around a particular level
Survival Needs and Functions Necessary for Life
maintaining boundaries
movement
responsiveness
digestion
metabolism
excretion
reproduction
growth
nutrients
oxygen
water
appropriate climate
Components of a Homeostatic Control Mechanism
stimulus
receptor
control center
set point
effector
Homeostatic Control Mechanisms Stimulus
