MARIEB HUMAN ANATOMY &
PHYSIOLOGY
12TH EDITION
AUTHOR(S)KATJA HOEHN;
LAWRENCE W. HAYNES;
MATTHEW A. ABBOTT
TEST BANK
1) Form and function in alveoli
Reference: Chapter 1 — Complementarity of Structure and
Function
Stem: A patient with pulmonary fibrosis has thickened alveolar
walls and progressively worsening shortness of breath during
exercise. The clinician explains that the patient’s gas exchange
,is impaired because oxygen must diffuse across a respiratory
membrane that is no longer optimal for exchange. Which
structural feature normally supports efficient alveolar function?
A. Thick epithelial layers that protect the alveoli from abrasion
B. A very thin respiratory membrane that minimizes diffusion
distance
C. Large amounts of smooth muscle to actively move gases
D. Dense connective tissue that stores oxygen for later release
Correct Answer: B
Rationales:
Correct Answer: The alveoli are structurally specialized for
rapid diffusion, and their thin walls greatly shorten the distance
gases must travel. This is a direct example of structure
determining function.
A: Thick walls would slow diffusion and reduce gas exchange
efficiency.
C: Smooth muscle does not move gases; gas exchange depends
on passive diffusion.
D: Alveoli are not designed for oxygen storage, and dense
connective tissue would hinder exchange.
Teaching Point: Thin walls increase diffusion efficiency in
exchange surfaces.
Citation: Hoehn, K., Haynes, L. W., & Abbott, M. A. (2025).
,Marieb Human Anatomy & Physiology (12th ed.). Chapter 1:
Complementarity of Structure and Function.
2) Histology and physiology connection
Reference: Chapter 1 — Topics of Anatomy / Studying Anatomy
Stem: A biopsy of the small intestine shows abundant microvilli
on the luminal surface of epithelial cells. A student asks why
this microscopic feature matters functionally. Which
explanation is best?
A. Microvilli increase surface area for nutrient absorption
B. Microvilli increase the number of red blood cells in the
intestine
C. Microvilli prevent the intestine from producing digestive
enzymes
D. Microvilli make the intestine rigid so it cannot stretch
Correct Answer: A
Rationales:
Correct Answer: Microvilli expand the absorptive surface area,
allowing more efficient nutrient uptake. This is a classic
structure-function relationship in anatomy.
B: Microvilli do not regulate blood cell production.
C: They do not prevent enzyme production; they support
absorption.
D: Microvilli are not responsible for rigidity.
, Teaching Point: Surface area increases support absorption in
epithelia.
Citation: Hoehn et al. (2025). Chapter 1: Studying Anatomy.
3) Gross anatomy and clinical reasoning
Reference: Chapter 1 — Topics of Anatomy
Stem: A surgeon planning an abdominal procedure reviews a
scan to identify the liver, stomach, and intestines as major
visible structures. The surgeon is working primarily at which
level of anatomical study?
A. Cytology
B. Gross anatomy
C. Physiology
D. Embryology
Correct Answer: B
Rationales:
Correct Answer: Gross anatomy focuses on structures visible
without a microscope, including organs such as the liver and
intestines.
A: Cytology studies cells, not whole organs.
C: Physiology concerns function rather than visible structure.
D: Embryology studies development before birth.
PHYSIOLOGY
12TH EDITION
AUTHOR(S)KATJA HOEHN;
LAWRENCE W. HAYNES;
MATTHEW A. ABBOTT
TEST BANK
1) Form and function in alveoli
Reference: Chapter 1 — Complementarity of Structure and
Function
Stem: A patient with pulmonary fibrosis has thickened alveolar
walls and progressively worsening shortness of breath during
exercise. The clinician explains that the patient’s gas exchange
,is impaired because oxygen must diffuse across a respiratory
membrane that is no longer optimal for exchange. Which
structural feature normally supports efficient alveolar function?
A. Thick epithelial layers that protect the alveoli from abrasion
B. A very thin respiratory membrane that minimizes diffusion
distance
C. Large amounts of smooth muscle to actively move gases
D. Dense connective tissue that stores oxygen for later release
Correct Answer: B
Rationales:
Correct Answer: The alveoli are structurally specialized for
rapid diffusion, and their thin walls greatly shorten the distance
gases must travel. This is a direct example of structure
determining function.
A: Thick walls would slow diffusion and reduce gas exchange
efficiency.
C: Smooth muscle does not move gases; gas exchange depends
on passive diffusion.
D: Alveoli are not designed for oxygen storage, and dense
connective tissue would hinder exchange.
Teaching Point: Thin walls increase diffusion efficiency in
exchange surfaces.
Citation: Hoehn, K., Haynes, L. W., & Abbott, M. A. (2025).
,Marieb Human Anatomy & Physiology (12th ed.). Chapter 1:
Complementarity of Structure and Function.
2) Histology and physiology connection
Reference: Chapter 1 — Topics of Anatomy / Studying Anatomy
Stem: A biopsy of the small intestine shows abundant microvilli
on the luminal surface of epithelial cells. A student asks why
this microscopic feature matters functionally. Which
explanation is best?
A. Microvilli increase surface area for nutrient absorption
B. Microvilli increase the number of red blood cells in the
intestine
C. Microvilli prevent the intestine from producing digestive
enzymes
D. Microvilli make the intestine rigid so it cannot stretch
Correct Answer: A
Rationales:
Correct Answer: Microvilli expand the absorptive surface area,
allowing more efficient nutrient uptake. This is a classic
structure-function relationship in anatomy.
B: Microvilli do not regulate blood cell production.
C: They do not prevent enzyme production; they support
absorption.
D: Microvilli are not responsible for rigidity.
, Teaching Point: Surface area increases support absorption in
epithelia.
Citation: Hoehn et al. (2025). Chapter 1: Studying Anatomy.
3) Gross anatomy and clinical reasoning
Reference: Chapter 1 — Topics of Anatomy
Stem: A surgeon planning an abdominal procedure reviews a
scan to identify the liver, stomach, and intestines as major
visible structures. The surgeon is working primarily at which
level of anatomical study?
A. Cytology
B. Gross anatomy
C. Physiology
D. Embryology
Correct Answer: B
Rationales:
Correct Answer: Gross anatomy focuses on structures visible
without a microscope, including organs such as the liver and
intestines.
A: Cytology studies cells, not whole organs.
C: Physiology concerns function rather than visible structure.
D: Embryology studies development before birth.
