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NAS 2 TCC study guide questions with correct answers
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NAS 2 TCC study guide questions withcorrect answers
What is the purpose of the scientific method? - ANSWER -The scientific method is an organized
way to study the natural world and find out how it works.
What are the steps of the scientific method? - ANSWER -Ask a Question.
Do Background Research.
Construct a Hypothesis.
Test Your Hypothesis by Doing an Experiment.
Analyze Your Data and Draw a Conclusion.
Communicate Your Results.
Distinguish between independent and dependent variables - ANSWER -An independent variable
is the variable that is changed or controlled in a scientific experiment to test the effects on the
dependent variable.
A dependent variable is the variable being tested and measured in a scientific experiment.
Distinguish between control and experimental groups - ANSWER -An experimental group is the
group in an experiment that receives the variable being tested. One variable is tested at a time.
The experimental group is compared to a control group, which does not receive the test
variable.
Distinguish between hypothesis and theory. - ANSWER -A hypothesis is an attempt to explain
phenomena. It is a proposal, a guess used to understand and/or predict something. A theory is
the result of testing a hypothesis and developing an explanation that is assumed to be true
about something.
NAS 2 TCC study guide questions with correct answers
, Define Anatomy and Physiology - ANSWER -Anatomy is the study of the structure and
relationship between body parts.
Physiology is the study of the function of body parts and the body as a whole.
Identify the six levels of organization (chemical, tissue, etc.) - ANSWER -1) Chemical Level
2) Cellular level
3)Tissue level
4)Organ level
5)Organ system level
6) Organismal level
Identify the requirements for life: - ANSWER -1. Reproduction 2. Response/reaction to
environment 3. Metabolism 4. Growth.
Identify survival needs: - ANSWER -survival needs (5): nutrients, oxygen, water, stable body
temperature, and atmospheric pressure
What is homeostasis? - ANSWER -The tendency of an organism or a cell to regulate its internal
conditions, usually by a system of feedback controls, so as to stabilize health and functioning,
regardless of the outside changing conditions.
What are the basic mechanisms of homeostasis? - ANSWER -- 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.
- Negative feedback brings a system back to its level of normal functioning such as adjusting
blood pressure, metabolism, and body temperature.
NAS 2 TCC study guide questions with correct answers
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