NAS2 Challenge Exam Questions and
Verified Solutions 2024
Purpose of Scientific Method - Answer -solve a problem or answer a question
Question, Hypothesis, Experiment, Observe & Record, Analyze, Conclude - Answer -steps of scientific
method
Independent variable - 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 - 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 - Answer -does not receive treatment and used to compare or measure the other subjects
experimental group - Answer -exposed to changes in independent variable
anatomy - Answer -branch of science concerned with bodily structure of living organisms; structure
physiology - Answer -science dealing with the functions of living things or their organs
level of organization - 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 - Answer -Cellular organization
Reproduction
Metabolism
Homeostasis
Heredity
Response to stimuli
Growth and development
Adaptation through evolution
survival needs - Answer -Food, oxygen, water, body temperature, atmospheric pressure (oxygen/carbon
dioxide exchange)
homeostasis - Answer -relatively constant internal physical and chemical conditions that organisms
maintain
receptor - Answer -senses environmental stimulus and sends info to control center
control center - Answer -hypothalamus
signals effector
effector - Answer -responds to stimuli
example: muscle contracting
negative feedback mechanisms - Answer -net effect is that the original output of the system shuts off the
original stimulus or reduces the intensity
homeostasis
negative feedback mechanisms - Answer -most common form of homeostasis, bringing people back to
normal functioning
negative feedback mechanisms - Answer -example of homeostasis: adjustments of blood pressure,
metabolism, body temp
positive feedback mechanisms - Answer -form of homeostasis
level of variable changes in same direction as initial change
enhances or accelerates output created by activated stimulus
Verified Solutions 2024
Purpose of Scientific Method - Answer -solve a problem or answer a question
Question, Hypothesis, Experiment, Observe & Record, Analyze, Conclude - Answer -steps of scientific
method
Independent variable - 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 - 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 - Answer -does not receive treatment and used to compare or measure the other subjects
experimental group - Answer -exposed to changes in independent variable
anatomy - Answer -branch of science concerned with bodily structure of living organisms; structure
physiology - Answer -science dealing with the functions of living things or their organs
level of organization - 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 - Answer -Cellular organization
Reproduction
Metabolism
Homeostasis
Heredity
Response to stimuli
Growth and development
Adaptation through evolution
survival needs - Answer -Food, oxygen, water, body temperature, atmospheric pressure (oxygen/carbon
dioxide exchange)
homeostasis - Answer -relatively constant internal physical and chemical conditions that organisms
maintain
receptor - Answer -senses environmental stimulus and sends info to control center
control center - Answer -hypothalamus
signals effector
effector - Answer -responds to stimuli
example: muscle contracting
negative feedback mechanisms - Answer -net effect is that the original output of the system shuts off the
original stimulus or reduces the intensity
homeostasis
negative feedback mechanisms - Answer -most common form of homeostasis, bringing people back to
normal functioning
negative feedback mechanisms - Answer -example of homeostasis: adjustments of blood pressure,
metabolism, body temp
positive feedback mechanisms - Answer -form of homeostasis
level of variable changes in same direction as initial change
enhances or accelerates output created by activated stimulus
