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NAS2 Challenge Exam|121 Answered Questions A+ Graded
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NAS2 Challenge Exam|121 AnsweredQuestions A+ Graded
Purpose of Scientific Method - -solve a problem or answer a question
-Question, Hypothesis, Experiment, Observe & Record, Analyze, Conclude -
-steps of scientific method
-Independent variable - -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 - -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 - -does not receive treatment and used to compare or
measure the other subjects
-experimental group - -exposed to changes in independent variable
-anatomy - -branch of science concerned with bodily structure of living
organisms; structure
-physiology - -science dealing with the functions of living things or their
organs
-level of organization - -living things arranged from the simplest to most
complex are:
organelle
cells
tissues
organs
organ systems, organism
populations communities
ecosystem
biosphere
-requirements for life - -Cellular organization
Reproduction
Metabolism
Homeostasis
, Heredity
Response to stimuli
Growth and development
Adaptation through evolution
-survival needs - -Food, oxygen, water, body temperature, atmospheric
pressure (oxygen/carbon dioxide exchange)
-homeostasis - -relatively constant internal physical and chemical
conditions that organisms maintain
-receptor - -senses environmental stimulus and sends info to control center
-control center - -hypothalamus
signals effector
-effector - -responds to stimuli
example: muscle contracting
-negative feedback mechanisms - -net effect is that the original output of
the system shuts off the original stimulus or reduces the intensity
homeostasis
-negative feedback mechanisms - -most common form of homeostasis,
bringing people back to normal functioning
-negative feedback mechanisms - -example of homeostasis: adjustments of
blood pressure, metabolism, body temp
-positive feedback mechanisms - -form of homeostasis
level of variable changes in same direction as initial change
enhances or accelerates output created by activated stimulus
-positive feedback mechanisms - -example of type of homeostasis: platelet
aggregation or accumulation in response to injury, child birth
-anatomical position - -erect position, face forward, arms at side, palms face
forward
used to describe relation to other things
-coronal, sagittal, transverse - -3 major planes of dissection
-cranial - -brain body region
-spinal/vertebral - -spinal cord body region
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