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NAS2 Challenge Exam 2023 with correct Answers
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NAS2 Challenge Exam 2023 with correct Answers
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NAS2 Challenge Exam 2023 with correct AnswersPurpose 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
positive feedback mechanisms - Answer- example of type of homeostasis: platelet aggregation or accumulation in response to injury, child birth
anatomical position - Answer- erect position, face forward, arms at side, palms face forward
used to describe relation to other things
coronal, sagittal, transverse - Answer- 3 major planes of dissection
cranial - Answer- brain body region
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