NAS2 CHALLENGE EXAM | QUESTIONS AND ANSWERS | VERIFIED
ANSWERS (100% CORRECT) | LATEST EXAM UPDATE
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
level of variable changes in same direction as initial change
enhances or accelerates output created by activated stimulus
positive feedback mechanisms - CORRECT ANSWER - example of type of
homeostasis: platelet aggregation or accumulation in response to injury, child
birth
ANSWERS (100% CORRECT) | LATEST EXAM UPDATE
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
level of variable changes in same direction as initial change
enhances or accelerates output created by activated stimulus
positive feedback mechanisms - CORRECT ANSWER - example of type of
homeostasis: platelet aggregation or accumulation in response to injury, child
birth
