OPENSTAX ANATOMY & PHYSIOLOGY 2ND EDITION (PDF) |
2026 EXAM QUESTIONS AND ANSWERS + RATIONALES |
STUDY GUIDE | 100% CORRECT
1. Which level of structural organization is considered the simplest in the human body?
A) Tissue level
B) Cellular level
C) Chemical level
D) Organ level
Correct Answer: Chemical level
Rationale: The chemical level is the simplest level of structural organization and includes atoms
and molecules, which are the building blocks of all matter . The cellular, tissue, and organ levels
represent increasing complexity, with each building upon the previous level. Understanding this
hierarchy is foundational to studying anatomy and physiology.
2. The word “anatomy” comes from a Greek root that means:
A) To cut apart
B) To view inside
C) To study exterior
D) To fix with
Correct Answer: To cut apart
Rationale: The term "anatomy" derives from the Greek words "ana" (up) and "tome" (cutting),
reflecting its historical reliance on dissection to understand body structure . This etymology
underscores the discipline's focus on observing and understanding the body's physical structure
through careful examination.
3. Which of the following specialties might focus on studying all of the structures of the
ankle and foot?
A) Microscopic anatomy
B) Muscle anatomy
C) Regional anatomy
D) Systemic anatomy
Correct Answer: Regional anatomy
Rationale: Regional anatomy focuses on all structures within a specific body region, such as the
ankle and foot, examining the relationships between muscles, nerves, vessels, and bones in that
area . Microscopic anatomy studies structures requiring magnification, and systemic anatomy
examines individual organ systems.
4. A scientist wants to study how the body uses foods and fluids during a marathon run.
This scientist is most likely a(n):
A) Exercise physiologist
, B) Microscopic anatomist
C) Regional physiologist
D) Systemic anatomist
Correct Answer: Exercise physiologist
Rationale: Exercise physiology is the study of how the body's systems respond and adapt to
physical activity, including metabolism, energy use, and fluid balance during exercise . The other
options focus on anatomical structure rather than physiological function during specific
activities.
5. The smallest independently functioning biological unit of an organism is a(n):
A) Cell
B) Molecule
C) Organ
D) Tissue
Correct Answer: Cell
Rationale: The cell is the smallest independently functioning unit of life, capable of performing
all the basic processes necessary for survival . While molecules are chemical building blocks,
tissues are collections of similar cells, and organs are composed of multiple tissue types working
together.
6. A collection of similar tissues that performs a specific function is an:
A) Organ
B) Organelle
C) Organism
D) Organ system
Correct Answer: Organ
Rationale: An organ is an anatomically distinct structure composed of two or more tissue types
that work together to perform specific functions . An organism is the entire living being,
organelles are subcellular structures, and organ systems are groups of organs working together.
7. The body system responsible for structural support and movement is the:
A) Cardiovascular system
B) Endocrine system
C) Muscular system
D) Skeletal system
Correct Answer: Skeletal system
Rationale: The skeletal system provides the structural framework, support, and protection for the
body . The muscular system, in conjunction with the skeleton, enables movement, while the
cardiovascular and endocrine systems have distinct functions related to transport and regulation.
, 8. Metabolism can be defined as the:
A) Adjustment by an organism to external or internal changes
B) Process whereby unspecialized cells become specialized
C) Process whereby new cells replace worn-out cells
D) Sum of all chemical reactions in an organism
Correct Answer: Sum of all chemical reactions in an organism
Rationale: Metabolism encompasses all the chemical reactions that occur within the body,
including catabolism (breaking down substances) and anabolism (building up substances) . These
reactions collectively maintain life by providing energy and synthesizing cellular components.
9. Adenosine triphosphate (ATP) is an important molecule 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
Correct Answer: Stores energy for use by body cells
Rationale: ATP is the primary energy currency of cells, capturing and storing chemical energy
for cellular work . It releases energy in controlled bursts through hydrolysis. The statement that
ATP is simply a result of catabolism is incomplete, as it is central to both energy production and
utilization.
10. 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
Correct Answer: Differentiation
Rationale: Differentiation is the process by which unspecialized cells become specialized to
perform distinct functions . Cancer cells are characterized by a lack of differentiation, meaning
they do not acquire the specialized characteristics of the tissue from which they originated,
contributing to their uncontrolled growth.
11. Humans have the most urgent need for a continuous supply of:
A) Food
B) Nitrogen
C) Oxygen
D) Water
Correct Answer: Oxygen
2026 EXAM QUESTIONS AND ANSWERS + RATIONALES |
STUDY GUIDE | 100% CORRECT
1. Which level of structural organization is considered the simplest in the human body?
A) Tissue level
B) Cellular level
C) Chemical level
D) Organ level
Correct Answer: Chemical level
Rationale: The chemical level is the simplest level of structural organization and includes atoms
and molecules, which are the building blocks of all matter . The cellular, tissue, and organ levels
represent increasing complexity, with each building upon the previous level. Understanding this
hierarchy is foundational to studying anatomy and physiology.
2. The word “anatomy” comes from a Greek root that means:
A) To cut apart
B) To view inside
C) To study exterior
D) To fix with
Correct Answer: To cut apart
Rationale: The term "anatomy" derives from the Greek words "ana" (up) and "tome" (cutting),
reflecting its historical reliance on dissection to understand body structure . This etymology
underscores the discipline's focus on observing and understanding the body's physical structure
through careful examination.
3. Which of the following specialties might focus on studying all of the structures of the
ankle and foot?
A) Microscopic anatomy
B) Muscle anatomy
C) Regional anatomy
D) Systemic anatomy
Correct Answer: Regional anatomy
Rationale: Regional anatomy focuses on all structures within a specific body region, such as the
ankle and foot, examining the relationships between muscles, nerves, vessels, and bones in that
area . Microscopic anatomy studies structures requiring magnification, and systemic anatomy
examines individual organ systems.
4. A scientist wants to study how the body uses foods and fluids during a marathon run.
This scientist is most likely a(n):
A) Exercise physiologist
, B) Microscopic anatomist
C) Regional physiologist
D) Systemic anatomist
Correct Answer: Exercise physiologist
Rationale: Exercise physiology is the study of how the body's systems respond and adapt to
physical activity, including metabolism, energy use, and fluid balance during exercise . The other
options focus on anatomical structure rather than physiological function during specific
activities.
5. The smallest independently functioning biological unit of an organism is a(n):
A) Cell
B) Molecule
C) Organ
D) Tissue
Correct Answer: Cell
Rationale: The cell is the smallest independently functioning unit of life, capable of performing
all the basic processes necessary for survival . While molecules are chemical building blocks,
tissues are collections of similar cells, and organs are composed of multiple tissue types working
together.
6. A collection of similar tissues that performs a specific function is an:
A) Organ
B) Organelle
C) Organism
D) Organ system
Correct Answer: Organ
Rationale: An organ is an anatomically distinct structure composed of two or more tissue types
that work together to perform specific functions . An organism is the entire living being,
organelles are subcellular structures, and organ systems are groups of organs working together.
7. The body system responsible for structural support and movement is the:
A) Cardiovascular system
B) Endocrine system
C) Muscular system
D) Skeletal system
Correct Answer: Skeletal system
Rationale: The skeletal system provides the structural framework, support, and protection for the
body . The muscular system, in conjunction with the skeleton, enables movement, while the
cardiovascular and endocrine systems have distinct functions related to transport and regulation.
, 8. Metabolism can be defined as the:
A) Adjustment by an organism to external or internal changes
B) Process whereby unspecialized cells become specialized
C) Process whereby new cells replace worn-out cells
D) Sum of all chemical reactions in an organism
Correct Answer: Sum of all chemical reactions in an organism
Rationale: Metabolism encompasses all the chemical reactions that occur within the body,
including catabolism (breaking down substances) and anabolism (building up substances) . These
reactions collectively maintain life by providing energy and synthesizing cellular components.
9. Adenosine triphosphate (ATP) is an important molecule 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
Correct Answer: Stores energy for use by body cells
Rationale: ATP is the primary energy currency of cells, capturing and storing chemical energy
for cellular work . It releases energy in controlled bursts through hydrolysis. The statement that
ATP is simply a result of catabolism is incomplete, as it is central to both energy production and
utilization.
10. 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
Correct Answer: Differentiation
Rationale: Differentiation is the process by which unspecialized cells become specialized to
perform distinct functions . Cancer cells are characterized by a lack of differentiation, meaning
they do not acquire the specialized characteristics of the tissue from which they originated,
contributing to their uncontrolled growth.
11. Humans have the most urgent need for a continuous supply of:
A) Food
B) Nitrogen
C) Oxygen
D) Water
Correct Answer: Oxygen
