MARIEB HUMAN ANATOMY & PHYSIOLOGY
12TH EDITION
AUTHOR(S)KATJA HOEHN; LAWRENCE W. HAYNES; MATTHEW
A. ABBOTT
PRACTICE QUESTIONS AND DETAILED RATIONALES
QUESTION 1
Reference: Chapter 1 — Complementarity of Structure and Function
A histology student examines a tissue sample and notes that the cells are extremely thin,
flattened, and form a continuous, tightly packed layer. When asked to predict the primary
function of this tissue, which physiological role is most consistent with this observed structure?
A. Active contraction to produce movement
B. Diffusion and filtration across the tissue layer
C. Storage of energy in the form of lipid droplets
D. Transmission of electrical impulses over long distances
Correct Answer: B
A. Incorrect: Contraction requires elongated, striated cells with abundant contractile proteins,
not flattened, tightly packed cells.
B. Correct: Thin, flattened cells arranged in continuous layers minimize diffusion distance and
are characteristic of epithelial tissues specialized for passive exchange, such as those found in
alveoli or capillary walls.
,C. Incorrect: Energy storage is a function of adipose tissue, which contains large lipid-filled cells,
not thin, flattened epithelial cells.
D. Incorrect: Electrical impulse transmission is a function of neurons, which have elongated
processes and specialized membrane proteins, not flattened epithelial cells.
Teaching Point: Structure and function are complementary; thin epithelial layers facilitate
diffusion and filtration, while other tissues are structurally specialized for contraction, storage,
or signaling.
Hoehn, K., Haynes, L. W., & Abbott, M. A. Marieb Human Anatomy & Physiology (12th ed.).
Chapter 1 — Complementarity of Structure and Function.
QUESTION 2
Reference: Chapter 1 — Levels of Structural Organization
A medical researcher is studying a newly discovered molecule that interacts with organelles
within cells to regulate energy production. At which level of structural organization is this
researcher primarily working?
A. Chemical level
B. Cellular level
C. Tissue level
D. Organ level
Correct Answer: B
A. Incorrect: The chemical level involves atoms and molecules, not organelles and their
interactions within cells.
B. Correct: Organelles are specialized structures within cells, and studying their function places
the research at the cellular level of organization, which includes cells and their internal
components.
,C. Incorrect: The tissue level consists of groups of similar cells working together, not the
internal components of individual cells.
D. Incorrect: The organ level involves structures composed of multiple tissue types performing
complex functions.
Teaching Point: The cellular level includes organelles and is one step above the chemical level
in the hierarchy of structural organization.
Hoehn, K., Haynes, L. W., & Abbott, M. A. Marieb Human Anatomy & Physiology (12th ed.).
Chapter 1 — Levels of Structural Organization.
QUESTION 3
Reference: Chapter 1 — Necessary Life Functions: Maintaining Boundaries
A patient with severe burns over a large portion of their body is at increased risk for infection
and fluid loss. Which necessary life function has been most directly compromised?
A. Responsiveness
B. Maintaining boundaries
C. Metabolism
D. Excretion
Correct Answer: B
A. Incorrect: Responsiveness refers to the ability to detect and respond to stimuli; although
infection may trigger immune responses, the primary issue is the compromised boundary.
B. Correct: The skin is a major external boundary that separates the internal environment from
the external environment. Burns that destroy skin integrity compromise this boundary, allowing
pathogen entry and fluid loss.
C. Incorrect: Metabolism refers to all chemical reactions within the body; while burns may
affect metabolism secondarily, the immediate compromise is to the body's boundary.
, D. Incorrect: Excretion is the elimination of metabolic wastes; while fluid loss may contain
waste products, the primary function lost is boundary maintenance.
Teaching Point: Maintaining boundaries, particularly the skin, is essential for protecting internal
tissues from pathogens and preventing fluid loss.
Hoehn, K., Haynes, L. W., & Abbott, M. A. Marieb Human Anatomy & Physiology (12th ed.).
Chapter 1 — Necessary Life Functions: Maintaining Boundaries.
QUESTION 4
Reference: Chapter 1 — Necessary Life Functions: Movement
A physical therapist is evaluating a patient who has difficulty lifting objects and walking. Which
type of movement is most directly affected in this patient?
A. Movement of substances through the digestive tract
B. Movement of blood through the cardiovascular system
C. Movement of the body as a whole
D. Movement of organelles within cells
Correct Answer: C
A. Incorrect: Movement through the digestive tract involves smooth muscle contraction and is
a type of internal movement, but the patient's difficulty with lifting and walking points to gross
body movement.
B. Incorrect: Blood movement through the cardiovascular system is an internal movement
driven by cardiac and smooth muscle contraction, not the skeletal muscle function indicated by
the scenario.
C. Correct: Lifting objects and walking are examples of gross body movement, which is primarily
accomplished by the skeletal muscular system and is essential for interacting with the
environment.
12TH EDITION
AUTHOR(S)KATJA HOEHN; LAWRENCE W. HAYNES; MATTHEW
A. ABBOTT
PRACTICE QUESTIONS AND DETAILED RATIONALES
QUESTION 1
Reference: Chapter 1 — Complementarity of Structure and Function
A histology student examines a tissue sample and notes that the cells are extremely thin,
flattened, and form a continuous, tightly packed layer. When asked to predict the primary
function of this tissue, which physiological role is most consistent with this observed structure?
A. Active contraction to produce movement
B. Diffusion and filtration across the tissue layer
C. Storage of energy in the form of lipid droplets
D. Transmission of electrical impulses over long distances
Correct Answer: B
A. Incorrect: Contraction requires elongated, striated cells with abundant contractile proteins,
not flattened, tightly packed cells.
B. Correct: Thin, flattened cells arranged in continuous layers minimize diffusion distance and
are characteristic of epithelial tissues specialized for passive exchange, such as those found in
alveoli or capillary walls.
,C. Incorrect: Energy storage is a function of adipose tissue, which contains large lipid-filled cells,
not thin, flattened epithelial cells.
D. Incorrect: Electrical impulse transmission is a function of neurons, which have elongated
processes and specialized membrane proteins, not flattened epithelial cells.
Teaching Point: Structure and function are complementary; thin epithelial layers facilitate
diffusion and filtration, while other tissues are structurally specialized for contraction, storage,
or signaling.
Hoehn, K., Haynes, L. W., & Abbott, M. A. Marieb Human Anatomy & Physiology (12th ed.).
Chapter 1 — Complementarity of Structure and Function.
QUESTION 2
Reference: Chapter 1 — Levels of Structural Organization
A medical researcher is studying a newly discovered molecule that interacts with organelles
within cells to regulate energy production. At which level of structural organization is this
researcher primarily working?
A. Chemical level
B. Cellular level
C. Tissue level
D. Organ level
Correct Answer: B
A. Incorrect: The chemical level involves atoms and molecules, not organelles and their
interactions within cells.
B. Correct: Organelles are specialized structures within cells, and studying their function places
the research at the cellular level of organization, which includes cells and their internal
components.
,C. Incorrect: The tissue level consists of groups of similar cells working together, not the
internal components of individual cells.
D. Incorrect: The organ level involves structures composed of multiple tissue types performing
complex functions.
Teaching Point: The cellular level includes organelles and is one step above the chemical level
in the hierarchy of structural organization.
Hoehn, K., Haynes, L. W., & Abbott, M. A. Marieb Human Anatomy & Physiology (12th ed.).
Chapter 1 — Levels of Structural Organization.
QUESTION 3
Reference: Chapter 1 — Necessary Life Functions: Maintaining Boundaries
A patient with severe burns over a large portion of their body is at increased risk for infection
and fluid loss. Which necessary life function has been most directly compromised?
A. Responsiveness
B. Maintaining boundaries
C. Metabolism
D. Excretion
Correct Answer: B
A. Incorrect: Responsiveness refers to the ability to detect and respond to stimuli; although
infection may trigger immune responses, the primary issue is the compromised boundary.
B. Correct: The skin is a major external boundary that separates the internal environment from
the external environment. Burns that destroy skin integrity compromise this boundary, allowing
pathogen entry and fluid loss.
C. Incorrect: Metabolism refers to all chemical reactions within the body; while burns may
affect metabolism secondarily, the immediate compromise is to the body's boundary.
, D. Incorrect: Excretion is the elimination of metabolic wastes; while fluid loss may contain
waste products, the primary function lost is boundary maintenance.
Teaching Point: Maintaining boundaries, particularly the skin, is essential for protecting internal
tissues from pathogens and preventing fluid loss.
Hoehn, K., Haynes, L. W., & Abbott, M. A. Marieb Human Anatomy & Physiology (12th ed.).
Chapter 1 — Necessary Life Functions: Maintaining Boundaries.
QUESTION 4
Reference: Chapter 1 — Necessary Life Functions: Movement
A physical therapist is evaluating a patient who has difficulty lifting objects and walking. Which
type of movement is most directly affected in this patient?
A. Movement of substances through the digestive tract
B. Movement of blood through the cardiovascular system
C. Movement of the body as a whole
D. Movement of organelles within cells
Correct Answer: C
A. Incorrect: Movement through the digestive tract involves smooth muscle contraction and is
a type of internal movement, but the patient's difficulty with lifting and walking points to gross
body movement.
B. Incorrect: Blood movement through the cardiovascular system is an internal movement
driven by cardiac and smooth muscle contraction, not the skeletal muscle function indicated by
the scenario.
C. Correct: Lifting objects and walking are examples of gross body movement, which is primarily
accomplished by the skeletal muscular system and is essential for interacting with the
environment.
