NAS 2 TCC Study Guide 2026 | Complete
Questions and Correct Answers (Verified
Answers) | Updated Version
What is the purpose of the scientific method? ---------CORRECT 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? ---------CORRECT 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 ---------CORRECT
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 ---------CORRECT 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. ---------CORRECT 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.
Define Anatomy and Physiology ---------CORRECT 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.) ---------CORRECT
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: ---------CORRECT ANSWER-----------------1.
Reproduction 2. Response/reaction to environment 3. Metabolism 4. Growth.
Identify survival needs: ---------CORRECT ANSWER-----------------survival needs (5):
nutrients, oxygen, water, stable body temperature, and atmospheric pressure
What is homeostasis? ---------CORRECT 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? ---------CORRECT 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.
Questions and Correct Answers (Verified
Answers) | Updated Version
What is the purpose of the scientific method? ---------CORRECT 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? ---------CORRECT 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 ---------CORRECT
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 ---------CORRECT 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. ---------CORRECT 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.
Define Anatomy and Physiology ---------CORRECT 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.) ---------CORRECT
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: ---------CORRECT ANSWER-----------------1.
Reproduction 2. Response/reaction to environment 3. Metabolism 4. Growth.
Identify survival needs: ---------CORRECT ANSWER-----------------survival needs (5):
nutrients, oxygen, water, stable body temperature, and atmospheric pressure
What is homeostasis? ---------CORRECT 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? ---------CORRECT 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.
