NAS2 Challenge Exam: Questions With Expert Solutions
Purpose of Scientific Method Correct Answer - solve a problem or
answer a question
Question, Hypothesis, Experiment, Observe & Record, Analyze, Conclude
Correct Answer - steps of scientific method
Independent variable Correct Answer - a variable that stands alone and
isn't changed by the other variables you are trying to measure, change or
controlled
example: age
dependent variable Correct Answer - a variable dependent on other
factors, tested or measured
example: test score - factors that go into a score you receive on a test
control group Correct Answer - does not receive treatment and used to
compare or measure the other subjects
experimental group Correct Answer - exposed to changes in
independent variable
anatomy Correct Answer - branch of science concerned with bodily
structure of living organisms; structure
physiology Correct Answer - science dealing with the functions of living
things or their organs
level of organization Correct Answer - living things arranged from the
simplest to most complex are:
organelle
cells
tissues
organs
organ systems, organism
populations communities
, ecosystem
biosphere
requirements for life Correct Answer - Cellular organization
Reproduction
Metabolism
Homeostasis
Heredity
Response to stimuli
Growth and development
Adaptation through evolution
survival needs Correct Answer - Food, oxygen, water, body temperature,
atmospheric pressure (oxygen/carbon dioxide exchange)
homeostasis Correct Answer - relatively constant internal physical and
chemical conditions that organisms maintain
receptor Correct Answer - senses environmental stimulus and sends info
to control center
control center Correct Answer - hypothalamus
signals effector
effector Correct Answer - responds to stimuli
example: muscle contracting
negative feedback mechanisms Correct Answer - net effect is that the
original output of the system shuts off the original stimulus or reduces the
intensity
homeostasis
negative feedback mechanisms Correct Answer - most common form of
homeostasis, bringing people back to normal functioning
negative feedback mechanisms Correct Answer - example of
homeostasis: adjustments of blood pressure, metabolism, body temp
positive feedback mechanisms Correct Answer - form of homeostasis
Purpose of Scientific Method Correct Answer - solve a problem or
answer a question
Question, Hypothesis, Experiment, Observe & Record, Analyze, Conclude
Correct Answer - steps of scientific method
Independent variable Correct Answer - a variable that stands alone and
isn't changed by the other variables you are trying to measure, change or
controlled
example: age
dependent variable Correct Answer - a variable dependent on other
factors, tested or measured
example: test score - factors that go into a score you receive on a test
control group Correct Answer - does not receive treatment and used to
compare or measure the other subjects
experimental group Correct Answer - exposed to changes in
independent variable
anatomy Correct Answer - branch of science concerned with bodily
structure of living organisms; structure
physiology Correct Answer - science dealing with the functions of living
things or their organs
level of organization Correct Answer - living things arranged from the
simplest to most complex are:
organelle
cells
tissues
organs
organ systems, organism
populations communities
, ecosystem
biosphere
requirements for life Correct Answer - Cellular organization
Reproduction
Metabolism
Homeostasis
Heredity
Response to stimuli
Growth and development
Adaptation through evolution
survival needs Correct Answer - Food, oxygen, water, body temperature,
atmospheric pressure (oxygen/carbon dioxide exchange)
homeostasis Correct Answer - relatively constant internal physical and
chemical conditions that organisms maintain
receptor Correct Answer - senses environmental stimulus and sends info
to control center
control center Correct Answer - hypothalamus
signals effector
effector Correct Answer - responds to stimuli
example: muscle contracting
negative feedback mechanisms Correct Answer - net effect is that the
original output of the system shuts off the original stimulus or reduces the
intensity
homeostasis
negative feedback mechanisms Correct Answer - most common form of
homeostasis, bringing people back to normal functioning
negative feedback mechanisms Correct Answer - example of
homeostasis: adjustments of blood pressure, metabolism, body temp
positive feedback mechanisms Correct Answer - form of homeostasis
