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NAS 2 EXAM QUESTIONS AND ANSWERS 2024

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  • NAS 2

NAS 2 EXAM QUESTIONS AND ANSWERS 2024

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  • September 8, 2024
  • 27
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • NAS 2
  • NAS 2
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Teacher101
NAS 2 EXAM


What 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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