TEST BANK FOR ANATOMY
AND PHYSIOLOGY 2ND
EDITION BY OPENSTAX,
ALL 28 CHAPTERS
COVERED, VERIFIED LATEST
EDITION
Anatomy and Physiology 2nd Edition (OpenStax)
Comprehensive Practice Exam | Questions with Bolded
Correct Answers & Detailed Rationales
Based on the official 28-chapter structure
Unit 1: Levels of Organization (Questions 1–50)
Chapter 1: An Introduction to the Human Body
1. The smallest independently functioning unit of an organism is a(n):
,A. Molecule
B. Cell
C. Organ
D. Tissue
Rationale: The cell is the smallest independently functioning unit of a living organism.
2. A collection of similar tissues that performs a specific function is a(n):
A. Organelle
B. Organ
C. Cell
D. Molecule
Rationale: An organ is a structure composed of two or more tissue types that work
together to perform specific functions.
3. The body system responsible for structural support and movement is the:
A. Cardiovascular system
B. Endocrine system
C. Muscular system
D. Nervous system
Rationale: The muscular system provides structural support and facilitates movement.
4. Metabolism can be defined as the:
A. Adjustment by an organism to external or internal changes
B. Process whereby all unspecialized cells become specialized
C. Process whereby new cells are formed to replace worn-out cells
D. Sum of all chemical reactions in an organism
Rationale: Metabolism encompasses all chemical reactions occurring within an
organism.
5. Adenosine triphosphate (ATP) is important because it:
A. Is the result of catabolism
B. Releases energy in uncontrolled bursts
C. Stores energy for use by body cells
D. All of the above
,Rationale: ATP serves as the primary energy currency of the cell, storing energy for
cellular processes.
6. Cancer cells can be characterized as "generic" cells that perform no specialized
body function. Thus cancer cells lack:
A. Differentiation
B. Reproduction
C. Responsiveness
D. Both reproduction and responsiveness
Rationale: Cancer cells lose their specialized characteristics through loss of
differentiation.
7. Humans have the most urgent need for a continuous supply of:
A. Food
B. Nitrogen
C. Oxygen
D. Water
Rationale: Oxygen is required continuously for cellular respiration and ATP production.
8. Which statement about nutrients is true?
A. All classes of nutrients are essential to human survival
B. Because the body cannot store any micronutrients, they need to be consumed nearly
every day
C. Carbohydrates, lipids, and proteins are macronutrients
D. Macronutrients are vitamins and minerals
Rationale: Carbohydrates, lipids, and proteins are macronutrients required in large
amounts.
9. A person stuck in a bitterly cold blizzard responds by:
A. Increasing blood flow to hands and feet
B. Becoming lethargic to conserve heat
C. Breaking down stored energy
D. Significantly increasing blood oxygen levels
Rationale: The body breaks down stored energy (glycogen and fat) to generate heat in
cold conditions.
, 10. After eating lunch, nerve cells in the stomach respond to distension and relay
information to:
A. A control center
B. A set point
C. Effectors
D. None of the above
Rationale: Sensory receptors send information to a control center, which processes the
input and directs effectors.
11. Stimulation of the heat-loss center causes:
A. Blood vessels in the skin to constrict
B. Breathing to become slow
C. Sweat glands to increase their output
D. All of the above
Rationale: The heat-loss center stimulates sweating and vasodilation to dissipate heat.
12. Which is an example of a normal physiological process that uses a positive
feedback loop?
A. Blood pressure regulation
B. Childbirth
C. Regulation of fluid balance
D. Body temperature regulation
Rationale: Childbirth (uterine contractions) is a classic example of positive feedback.
13. In the "normal anatomical position," the person is:
A. Prone with palms touching sides
B. Standing facing the observer with arms extended
C. Supine with palms touching sides
D. Standing upright, feet parallel, upper limbs at sides with palms facing forward
Rationale: Anatomical position is standing upright, feet parallel, arms at sides, palms
facing forward.
14. To halve a banana into right and left sides, you cut along the:
AND PHYSIOLOGY 2ND
EDITION BY OPENSTAX,
ALL 28 CHAPTERS
COVERED, VERIFIED LATEST
EDITION
Anatomy and Physiology 2nd Edition (OpenStax)
Comprehensive Practice Exam | Questions with Bolded
Correct Answers & Detailed Rationales
Based on the official 28-chapter structure
Unit 1: Levels of Organization (Questions 1–50)
Chapter 1: An Introduction to the Human Body
1. The smallest independently functioning unit of an organism is a(n):
,A. Molecule
B. Cell
C. Organ
D. Tissue
Rationale: The cell is the smallest independently functioning unit of a living organism.
2. A collection of similar tissues that performs a specific function is a(n):
A. Organelle
B. Organ
C. Cell
D. Molecule
Rationale: An organ is a structure composed of two or more tissue types that work
together to perform specific functions.
3. The body system responsible for structural support and movement is the:
A. Cardiovascular system
B. Endocrine system
C. Muscular system
D. Nervous system
Rationale: The muscular system provides structural support and facilitates movement.
4. Metabolism can be defined as the:
A. Adjustment by an organism to external or internal changes
B. Process whereby all unspecialized cells become specialized
C. Process whereby new cells are formed to replace worn-out cells
D. Sum of all chemical reactions in an organism
Rationale: Metabolism encompasses all chemical reactions occurring within an
organism.
5. Adenosine triphosphate (ATP) is important because it:
A. Is the result of catabolism
B. Releases energy in uncontrolled bursts
C. Stores energy for use by body cells
D. All of the above
,Rationale: ATP serves as the primary energy currency of the cell, storing energy for
cellular processes.
6. Cancer cells can be characterized as "generic" cells that perform no specialized
body function. Thus cancer cells lack:
A. Differentiation
B. Reproduction
C. Responsiveness
D. Both reproduction and responsiveness
Rationale: Cancer cells lose their specialized characteristics through loss of
differentiation.
7. Humans have the most urgent need for a continuous supply of:
A. Food
B. Nitrogen
C. Oxygen
D. Water
Rationale: Oxygen is required continuously for cellular respiration and ATP production.
8. Which statement about nutrients is true?
A. All classes of nutrients are essential to human survival
B. Because the body cannot store any micronutrients, they need to be consumed nearly
every day
C. Carbohydrates, lipids, and proteins are macronutrients
D. Macronutrients are vitamins and minerals
Rationale: Carbohydrates, lipids, and proteins are macronutrients required in large
amounts.
9. A person stuck in a bitterly cold blizzard responds by:
A. Increasing blood flow to hands and feet
B. Becoming lethargic to conserve heat
C. Breaking down stored energy
D. Significantly increasing blood oxygen levels
Rationale: The body breaks down stored energy (glycogen and fat) to generate heat in
cold conditions.
, 10. After eating lunch, nerve cells in the stomach respond to distension and relay
information to:
A. A control center
B. A set point
C. Effectors
D. None of the above
Rationale: Sensory receptors send information to a control center, which processes the
input and directs effectors.
11. Stimulation of the heat-loss center causes:
A. Blood vessels in the skin to constrict
B. Breathing to become slow
C. Sweat glands to increase their output
D. All of the above
Rationale: The heat-loss center stimulates sweating and vasodilation to dissipate heat.
12. Which is an example of a normal physiological process that uses a positive
feedback loop?
A. Blood pressure regulation
B. Childbirth
C. Regulation of fluid balance
D. Body temperature regulation
Rationale: Childbirth (uterine contractions) is a classic example of positive feedback.
13. In the "normal anatomical position," the person is:
A. Prone with palms touching sides
B. Standing facing the observer with arms extended
C. Supine with palms touching sides
D. Standing upright, feet parallel, upper limbs at sides with palms facing forward
Rationale: Anatomical position is standing upright, feet parallel, arms at sides, palms
facing forward.
14. To halve a banana into right and left sides, you cut along the:
