1
GTCC BIO 168 Test 1 Chapters 1-4 /// Questions
1–200 | Questions with answers| Latest Update
2026 | 100% Pass Guaranteed | Graded A+
1. Which of the following best defines anatomy?
A. The study of function
B. The study of structure
C. The study of disease
D. The study of tissues
ANS: B
Explanation: Anatomy is defined as the study of structure, while physiology is the study of
function .
2. Which of the following best defines physiology?
A. The study of structure
B. The study of function
C. The study of cells
D. The study of tissues
ANS: B
Explanation: Physiology is the study of function of the body parts .
3. Which of the following correctly lists the six levels of structural organization from
simplest to most complex?
A. Cellular, atomic, tissue, organ, organism, organ system
B. Atomic, cellular, tissue, organ, organ system, organism
C. Tissue, atomic, cellular, organ, organism, organ system
D. Atomic, tissue, cellular, organ, organ system, organism
,2
ANS: B
Explanation: The six levels of organization are atomic, cellular, tissue, organ, organ system,
and organism .
4. Which of the following is the correct definition of a tissue?
A. Groups of organs with a primary function
B. Groups of cells with a primary function
C. Groups of molecules with a primary function
D. Groups of atoms with a primary function
ANS: B
Explanation: A tissue is defined as groups of cells with a primary function .
5. Which of the following is the correct definition of an organ?
A. Groups of cells with a primary function
B. Groups of tissues with many functions
C. Groups of organs with a primary function
D. Groups of molecules with many functions
ANS: B
Explanation: An organ is defined as groups of tissues with many functions .
6. Which of the following best defines homeostasis?
A. The breakdown of molecules in the body
B. The levels of organization working together to create a stable environment
C. The study of body structures
D. The production of energy in cells
ANS: B
Explanation: Homeostasis is defined as the levels of organization working together to create a
stable environment .
7. In a negative feedback mechanism, what happens to the original stimulus?
,3
A. It is enhanced
B. It is negated
C. It is ignored
D. It is amplified
ANS: B
Explanation: Negative feedback produces a response that negates the original stimulus, such
as when a dog barks, we yell, and the dog stops barking .
8. Which of the following is an example of a positive feedback mechanism?
A. Regulation of blood glucose
B. Enhancement of labor contractions
C. Regulation of body temperature
D. Control of blood pressure
ANS: B
Explanation: Positive feedback enhances the original stimulus. An example is the
enhancement of labor contractions during childbirth .
9. Which structure in a feedback loop senses a stimulus?
A. Control center
B. Effector
C. Receptor
D. Response
ANS: C
Explanation: The receptor senses a stimulus and sends information to the control center .
10. Which structure in a feedback loop receives information from the receptor and
processes the stimulus?
A. Receptor
B. Control center
C. Effector
D. Stimulus
, 4
ANS: B
Explanation: The control center receives information from the receptor and processes the
stimulus .
11. Which structure in a feedback loop responds to the control center's indication?
A. Receptor
B. Control center
C. Effector
D. Stimulus
ANS: C
Explanation: The effector responds to the control center's indication to produce a response .
12. Which plane divides the body into superior and inferior parts?
A. Sagittal plane
B. Frontal plane
C. Transverse plane
D. Midsagittal plane
ANS: C
Explanation: The transverse plane divides the body into superior (upper) and inferior (lower)
parts .
13. Which plane divides the body into anterior and posterior parts?
A. Sagittal plane
B. Frontal plane
C. Transverse plane
D. Midsagittal plane
ANS: B
Explanation: The frontal (coronal) plane divides the body into anterior (front) and posterior
(back) parts .
GTCC BIO 168 Test 1 Chapters 1-4 /// Questions
1–200 | Questions with answers| Latest Update
2026 | 100% Pass Guaranteed | Graded A+
1. Which of the following best defines anatomy?
A. The study of function
B. The study of structure
C. The study of disease
D. The study of tissues
ANS: B
Explanation: Anatomy is defined as the study of structure, while physiology is the study of
function .
2. Which of the following best defines physiology?
A. The study of structure
B. The study of function
C. The study of cells
D. The study of tissues
ANS: B
Explanation: Physiology is the study of function of the body parts .
3. Which of the following correctly lists the six levels of structural organization from
simplest to most complex?
A. Cellular, atomic, tissue, organ, organism, organ system
B. Atomic, cellular, tissue, organ, organ system, organism
C. Tissue, atomic, cellular, organ, organism, organ system
D. Atomic, tissue, cellular, organ, organ system, organism
,2
ANS: B
Explanation: The six levels of organization are atomic, cellular, tissue, organ, organ system,
and organism .
4. Which of the following is the correct definition of a tissue?
A. Groups of organs with a primary function
B. Groups of cells with a primary function
C. Groups of molecules with a primary function
D. Groups of atoms with a primary function
ANS: B
Explanation: A tissue is defined as groups of cells with a primary function .
5. Which of the following is the correct definition of an organ?
A. Groups of cells with a primary function
B. Groups of tissues with many functions
C. Groups of organs with a primary function
D. Groups of molecules with many functions
ANS: B
Explanation: An organ is defined as groups of tissues with many functions .
6. Which of the following best defines homeostasis?
A. The breakdown of molecules in the body
B. The levels of organization working together to create a stable environment
C. The study of body structures
D. The production of energy in cells
ANS: B
Explanation: Homeostasis is defined as the levels of organization working together to create a
stable environment .
7. In a negative feedback mechanism, what happens to the original stimulus?
,3
A. It is enhanced
B. It is negated
C. It is ignored
D. It is amplified
ANS: B
Explanation: Negative feedback produces a response that negates the original stimulus, such
as when a dog barks, we yell, and the dog stops barking .
8. Which of the following is an example of a positive feedback mechanism?
A. Regulation of blood glucose
B. Enhancement of labor contractions
C. Regulation of body temperature
D. Control of blood pressure
ANS: B
Explanation: Positive feedback enhances the original stimulus. An example is the
enhancement of labor contractions during childbirth .
9. Which structure in a feedback loop senses a stimulus?
A. Control center
B. Effector
C. Receptor
D. Response
ANS: C
Explanation: The receptor senses a stimulus and sends information to the control center .
10. Which structure in a feedback loop receives information from the receptor and
processes the stimulus?
A. Receptor
B. Control center
C. Effector
D. Stimulus
, 4
ANS: B
Explanation: The control center receives information from the receptor and processes the
stimulus .
11. Which structure in a feedback loop responds to the control center's indication?
A. Receptor
B. Control center
C. Effector
D. Stimulus
ANS: C
Explanation: The effector responds to the control center's indication to produce a response .
12. Which plane divides the body into superior and inferior parts?
A. Sagittal plane
B. Frontal plane
C. Transverse plane
D. Midsagittal plane
ANS: C
Explanation: The transverse plane divides the body into superior (upper) and inferior (lower)
parts .
13. Which plane divides the body into anterior and posterior parts?
A. Sagittal plane
B. Frontal plane
C. Transverse plane
D. Midsagittal plane
ANS: B
Explanation: The frontal (coronal) plane divides the body into anterior (front) and posterior
(back) parts .
