Exam (elaborations)
NAS 2 EXAM QUESTIONS AND ANSWERS 2024
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NAS 2 EXAM QUESTIONS AND ANSWERS 2024
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NAS 2 EXAMWhat are the 6 levels of organization? - ANSWERS-1. chemical
2. cellular
3. tissue
4. organ
5. organ system
6. organism
Identify the requirements for life - ANSWERS-1. Reproduction
2. Response/reaction to environment
3. Metabolism
4. Growth.
What are the survival needs - ANSWERS-1. nutrients
2. oxygen
3. water
4. normal body temp.
5. atmospheric pressure
,Scientific Method - ANSWERS-an organized way to study the natural world and
find out how it works
What are the steps of the scientific method? - ANSWERS-1. Make an Observation
2. Ask a question
3. Form a hypothesis
4. Make a prediction
5. Do an experiment
6. Report results
Independent variable - ANSWERS-the variable that is changed or controlled in a
scientific experiment to the test it effects on the dependent variable
Dependent variable - ANSWERS-the variable being tested and measured in a
scientific experiment
Experimental group - ANSWERS-The group in an experiment that receives the
variable being tested
Control group - ANSWERS-the group that doesn't receive the treatment, contains
every feature of the experimental group except it is not given the manipulation
that the researcher hypothesizes.
, Hypothesis - ANSWERS-an attempt to explain a phenomena. it's a proposal, or
guess to understand/predict something
Theory - ANSWERS-the result of testing a hypothesis and developing an
explanation that is assumed to be true about something
Anatomy - ANSWERS-the study of structure and relationship between body parts
Physiology - ANSWERS-the study of the function of body parts and the body as a
whole
homeostasis? - ANSWERS-the tendency of an organism or cell to regulate its
internal conditions, usually by a system of feedback controls, so as to stabilize
health and function
What are the basic mechanisms of homeostasis? - ANSWERS-- Homeostatic
control mechanisms have at least three interdependent components: receptor,
control center, and effector.
- The receptor senses environmental stimuli, sending the information to the
control center.
- The control center, generally the brain, signals an effector (e.g. muscles) to
respond to the stimuli.
- Positive feedback enhances or accelerates output created by an activated
stimulus.
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