BIOL 251 MODULE 5 EXAM REVIEW | HUMAN ANATOMY &
PHYSIOLOGY I WITH LAB | QUESTIONS WITH CORRECT
ANSWERS AND RATIONALES| PORTAGE LEARNING 2026/2027
140 Questions with Answers and Detailed Rationales
100 PERCENT GUARANTEED PASS
INSTANT DOWNLOAD ANSWERS INCLUDED
IMPORTANCE OF THIS DOCUMENT
This comprehensive examination preparation guide has been meticulously developed to help you succeed in the
BIOL 251 MODULE 5 EXAM REVIEW | HUMAN ANATOMY & PHYSIOLOGY I WITH LAB | QUESTIONS WITH
CORRECT ANSWERS AND RATIONALES| PORTAGE LEARNING 2026/2027. It contains 140 carefully selected
questions that reflect the most current exam content and testing strategies. Each question is accompanied by a
correct answer and a detailed rationale that explains the underlying pathophysiology, pharmacology, or clinical
reasoning.
Self-Assessment – Test your knowledge and Exam Preparation – Familiarize yourself with the
identify areas requiring further question format and content
study areas
Concept Reinforcement – Deepen your Confidence Building – Develop test-taking
understanding through strategies and reduce
evidence-based exam anxiety
rationales
Time Management – Practice answering
questions under simulated
exam conditions
Review Summary 140 Questions
Foundations - Application - BIOL 251 Module 5 Review Human Anatomy & Physiology I WITH LAB WITH
Correct AND Rationales Portage Learning 2026/2027 Human Anatomy & Physiology I WITH LAB
Undergraduate YEAR 3 / Graduate
All answers with rationales
,Table of Contents
Content Area Questions Key Topics
Integumentary System 1-24 Likely, Muscle, Researcher, Blocks, Immediate
Skeletal System AND Joints 25-48 Explains, Describes, Muscle, Changes, Likely
Muscular System 49-72 Effect, Receptor, Mechanism, Expected, Potential
Nervous System 73-96 Describes, Potential, Expected, Muscle, Skeletal
Special Senses 97-120 Potential, Pressure, Directly, Effect, Blocks
Endocrine System 121-140 Likely, Describes, Muscle, Explains, Potential
TOTAL 140 All questions include answers and detailed rationales
,Section A - Integumentary System
Q1.
A researcher is investigating the role of a specific cell type in wound healing. They
observe that these cells are capable of phagocytosing debris and also secrete cytokines
that promote fibroblast proliferation. Which cell type is most likely responsible?
A. Keratinocyte B. Macrophage
C. Mast cell D. Fibroblast
Correct: B - Macrophage
Rationale:Macrophages are phagocytic cells that also release growth factors and cytokines,
such as PDGF and TGF-beta, which stimulate fibroblast activity and angiogenesis, crucial for
wound healing. Keratinocytes primarily produce keratin and form the epidermal barrier, not
significant phagocytosis. Mast cells release histamine and are involved in inflammation, not
direct phagocytosis. Fibroblasts produce collagen and extracellular matrix, but they are not
primarily phagocytic.
Why the other answers are wrong:
A. Keratinocytes form the epidermal barrier and produce keratin, not phagocytic or
cytokine-secreting.
C. Mast cells release histamine and mediate allergic responses, not phagocytosis.
D. Fibroblasts synthesize collagen and ECM, but are not phagocytic.
Reference: Tortora, G.J. & Derrickson, B. (2026). Principles of Anatomy and Physiology, 16th Ed., Ch. 5.
Q2.
In a patient with a fracture, which sequence of events correctly describes the cellular and
molecular processes of bone healing?
A. Hematoma formation -> Cartilage callus B. Cartilage callus formation -> Hematoma
formation -> Bony callus formation -> Bone formation -> Bony callus formation -> Bone
remodeling remodeling
C. Hematoma formation -> Bony callus D. Bone remodeling -> Hematoma formation
formation -> Cartilage callus formation -> -> Cartilage callus formation -> Bony callus
Bone remodeling formation
Correct: A - Hematoma formation -> Cartilage callus formation -> Bony callus formation ->
Bone remodeling
Rationale:Fracture healing proceeds through four stages: (1) hematoma formation, (2)
fibrocartilaginous callus formation, (3) bony callus formation, and (4) bone remodeling. This
sequence is essential for restoring structural integrity. The other options incorrectly order the
callus types or reverse the entire process.
Page 3
, Section A - Integumentary System
Why the other answers are wrong:
B. Hematoma formation must precede any callus formation.
C. Cartilage callus forms before bony callus, not after.
D. Remodeling is the final stage, not the first.
Reference: OpenStax Anatomy & Physiology, 2nd Ed., Ch. 6.5.
Q3.
During skeletal muscle contraction, the power stroke occurs when myosin heads pivot
and pull actin filaments toward the M line. Which event directly triggers the power stroke?
A. Release of ADP and inorganic phosphate B. Binding of ATP to the myosin head
(Pi) from the myosin head
C. Increase in intracellular calcium D. Removal of tropomyosin from the active
concentration site
Correct: A - Release of ADP and inorganic phosphate (Pi) from the myosin head
Rationale:The power stroke is the conformational change in the myosin head that occurs
when ADP and Pi are released, causing the head to pivot and pull the actin filament. ATP
binding causes detachment of myosin from actin, not the power stroke. Calcium increase
initiates contraction by exposing binding sites, but the actual power stroke requires ADP/Pi
release. Tropomyosin removal is a prerequisite, not the trigger.
Why the other answers are wrong:
B. ATP binding causes myosin to detach from actin, not the power stroke.
C. Calcium initiates contraction by regulating troponin, but does not directly cause the power
stroke.
D. Tropomyosin removal exposes binding sites, but does not trigger the power stroke.
Reference: Lehne, R.A. (2026). Pharmacology for Nursing Care, 12th Ed., Ch. 18.
Q4.
A patient presents with impaired thermoregulation and an inability to sweat on the left
side of the body. Which structure is most likely damaged?
A. Eccrine sweat glands on the left side B. Sympathetic chain ganglia on the left side
C. Hypothalamus D. Apocrine sweat glands on the left side
Correct: B - Sympathetic chain ganglia on the left side
Rationale:Eccrine sweat glands are innervated by sympathetic cholinergic fibers that travel
through the sympathetic chain. Damage to the sympathetic chain on one side would result in
anhidrosis (lack of sweating) on that side. Eccrine glands themselves might be intact, but
denervation causes loss of function. Hypothalamus damage would affect both sides. Apocrine
glands are not primarily involved in thermoregulation.
Page 4
PHYSIOLOGY I WITH LAB | QUESTIONS WITH CORRECT
ANSWERS AND RATIONALES| PORTAGE LEARNING 2026/2027
140 Questions with Answers and Detailed Rationales
100 PERCENT GUARANTEED PASS
INSTANT DOWNLOAD ANSWERS INCLUDED
IMPORTANCE OF THIS DOCUMENT
This comprehensive examination preparation guide has been meticulously developed to help you succeed in the
BIOL 251 MODULE 5 EXAM REVIEW | HUMAN ANATOMY & PHYSIOLOGY I WITH LAB | QUESTIONS WITH
CORRECT ANSWERS AND RATIONALES| PORTAGE LEARNING 2026/2027. It contains 140 carefully selected
questions that reflect the most current exam content and testing strategies. Each question is accompanied by a
correct answer and a detailed rationale that explains the underlying pathophysiology, pharmacology, or clinical
reasoning.
Self-Assessment – Test your knowledge and Exam Preparation – Familiarize yourself with the
identify areas requiring further question format and content
study areas
Concept Reinforcement – Deepen your Confidence Building – Develop test-taking
understanding through strategies and reduce
evidence-based exam anxiety
rationales
Time Management – Practice answering
questions under simulated
exam conditions
Review Summary 140 Questions
Foundations - Application - BIOL 251 Module 5 Review Human Anatomy & Physiology I WITH LAB WITH
Correct AND Rationales Portage Learning 2026/2027 Human Anatomy & Physiology I WITH LAB
Undergraduate YEAR 3 / Graduate
All answers with rationales
,Table of Contents
Content Area Questions Key Topics
Integumentary System 1-24 Likely, Muscle, Researcher, Blocks, Immediate
Skeletal System AND Joints 25-48 Explains, Describes, Muscle, Changes, Likely
Muscular System 49-72 Effect, Receptor, Mechanism, Expected, Potential
Nervous System 73-96 Describes, Potential, Expected, Muscle, Skeletal
Special Senses 97-120 Potential, Pressure, Directly, Effect, Blocks
Endocrine System 121-140 Likely, Describes, Muscle, Explains, Potential
TOTAL 140 All questions include answers and detailed rationales
,Section A - Integumentary System
Q1.
A researcher is investigating the role of a specific cell type in wound healing. They
observe that these cells are capable of phagocytosing debris and also secrete cytokines
that promote fibroblast proliferation. Which cell type is most likely responsible?
A. Keratinocyte B. Macrophage
C. Mast cell D. Fibroblast
Correct: B - Macrophage
Rationale:Macrophages are phagocytic cells that also release growth factors and cytokines,
such as PDGF and TGF-beta, which stimulate fibroblast activity and angiogenesis, crucial for
wound healing. Keratinocytes primarily produce keratin and form the epidermal barrier, not
significant phagocytosis. Mast cells release histamine and are involved in inflammation, not
direct phagocytosis. Fibroblasts produce collagen and extracellular matrix, but they are not
primarily phagocytic.
Why the other answers are wrong:
A. Keratinocytes form the epidermal barrier and produce keratin, not phagocytic or
cytokine-secreting.
C. Mast cells release histamine and mediate allergic responses, not phagocytosis.
D. Fibroblasts synthesize collagen and ECM, but are not phagocytic.
Reference: Tortora, G.J. & Derrickson, B. (2026). Principles of Anatomy and Physiology, 16th Ed., Ch. 5.
Q2.
In a patient with a fracture, which sequence of events correctly describes the cellular and
molecular processes of bone healing?
A. Hematoma formation -> Cartilage callus B. Cartilage callus formation -> Hematoma
formation -> Bony callus formation -> Bone formation -> Bony callus formation -> Bone
remodeling remodeling
C. Hematoma formation -> Bony callus D. Bone remodeling -> Hematoma formation
formation -> Cartilage callus formation -> -> Cartilage callus formation -> Bony callus
Bone remodeling formation
Correct: A - Hematoma formation -> Cartilage callus formation -> Bony callus formation ->
Bone remodeling
Rationale:Fracture healing proceeds through four stages: (1) hematoma formation, (2)
fibrocartilaginous callus formation, (3) bony callus formation, and (4) bone remodeling. This
sequence is essential for restoring structural integrity. The other options incorrectly order the
callus types or reverse the entire process.
Page 3
, Section A - Integumentary System
Why the other answers are wrong:
B. Hematoma formation must precede any callus formation.
C. Cartilage callus forms before bony callus, not after.
D. Remodeling is the final stage, not the first.
Reference: OpenStax Anatomy & Physiology, 2nd Ed., Ch. 6.5.
Q3.
During skeletal muscle contraction, the power stroke occurs when myosin heads pivot
and pull actin filaments toward the M line. Which event directly triggers the power stroke?
A. Release of ADP and inorganic phosphate B. Binding of ATP to the myosin head
(Pi) from the myosin head
C. Increase in intracellular calcium D. Removal of tropomyosin from the active
concentration site
Correct: A - Release of ADP and inorganic phosphate (Pi) from the myosin head
Rationale:The power stroke is the conformational change in the myosin head that occurs
when ADP and Pi are released, causing the head to pivot and pull the actin filament. ATP
binding causes detachment of myosin from actin, not the power stroke. Calcium increase
initiates contraction by exposing binding sites, but the actual power stroke requires ADP/Pi
release. Tropomyosin removal is a prerequisite, not the trigger.
Why the other answers are wrong:
B. ATP binding causes myosin to detach from actin, not the power stroke.
C. Calcium initiates contraction by regulating troponin, but does not directly cause the power
stroke.
D. Tropomyosin removal exposes binding sites, but does not trigger the power stroke.
Reference: Lehne, R.A. (2026). Pharmacology for Nursing Care, 12th Ed., Ch. 18.
Q4.
A patient presents with impaired thermoregulation and an inability to sweat on the left
side of the body. Which structure is most likely damaged?
A. Eccrine sweat glands on the left side B. Sympathetic chain ganglia on the left side
C. Hypothalamus D. Apocrine sweat glands on the left side
Correct: B - Sympathetic chain ganglia on the left side
Rationale:Eccrine sweat glands are innervated by sympathetic cholinergic fibers that travel
through the sympathetic chain. Damage to the sympathetic chain on one side would result in
anhidrosis (lack of sweating) on that side. Eccrine glands themselves might be intact, but
denervation causes loss of function. Hypothalamus damage would affect both sides. Apocrine
glands are not primarily involved in thermoregulation.
Page 4
