NAS 2 TCC REAL EXAM QUESTIONS AND
ANSWERS NEWLY MODIFIED TESTED AND
APPROVED GRADED A+ 2025/2026 LATEST
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.
Page 1 of 23
,Anatomical position --CORRECT ANSWER--Anatomical position is
the description of any region or part of the body in a specific stance.
In the anatomical position, the body is upright, directly facing the
observer, feet flat and directed forward. The upper limbs are at the
body's sides with the palms facing forward.
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.
Page 2 of 23
, 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.
Page 3 of 23
ANSWERS NEWLY MODIFIED TESTED AND
APPROVED GRADED A+ 2025/2026 LATEST
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.
Page 1 of 23
,Anatomical position --CORRECT ANSWER--Anatomical position is
the description of any region or part of the body in a specific stance.
In the anatomical position, the body is upright, directly facing the
observer, feet flat and directed forward. The upper limbs are at the
body's sides with the palms facing forward.
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.
Page 2 of 23
, 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.
Page 3 of 23
