BIOL 252 HUMAN ANATOMY & PHYSIOLOGY II W/LAB MODULE
1 ACTUAL EXAM - PORTAGE LEARNING - 2026/2027 ACADEMIC
YEAR - VERIFIED QUESTIONS AND ANSWERS
182 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 252 HUMAN ANATOMY & PHYSIOLOGY II W/LAB MODULE 1 ACTUAL EXAM - PORTAGE LEARNING -
2026/2027 ACADEMIC YEAR - VERIFIED QUESTIONS AND ANSWERS. It contains 182 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 182 Questions
Foundations - Application - BIOL 252 Human Anatomy & Physiology II W/lab Module 1 Actual Portage
Learning 2026/2027 Academic YEAR AND Human Anatomy & Physiology II WITH LAB Undergraduate YEAR
3 Advanced
All answers with rationales
,Table of Contents
Content Area Questions Key Topics
BIOL 252 Human Anatomy & 1-31 Pressure, Explains, Describes, Directly Responsible, Renal
Physiology II W/lab Module 1
Actual Portage Learning
2026/2027 Academic YEAR
AND Human Anatomy &
Physiology II WITH LAB
Undergraduate YEAR 3
Advanced
Likely 32-62 Primary, Chronic, Renal, Arterial, Normal
Pressure 63-93 Cardiac, Likely, Explains, Ventricular, Blood
Blood 94-124 Explains, Renal, Plasma, Glomerular, Likely
Chronic 125-155 Explains, Likely, Change, Respiratory, Pressure
Renal 156-182 Explains, Blood, Likely, Chronic, Mechanism
TOTAL 182 All questions include answers and detailed rationales
,Section A - BIOL 252 Human Anatomy & Physiology II
W/lab Module 1 Actual Portage Learning 2026/2027
Academic YEAR AND Human Anatomy & Physiology II
WITH LAB Undergraduate YEAR 3 Advanced
Q1.
A patient with chronic hypoventilation develops respiratory acidosis. Over 48 hours, the
kidneys compensate. Which renal response is most directly responsible for the
compensatory increase in plasma bicarbonate concentration?
A. Increased excretion of H+ as titratable B. Increased reabsorption of filtered HCO3
acid via phosphate buffering in the proximal tubule
C. Decreased excretion of NH4+ into the D. Increased synthesis of carbonic
tubular lumen anhydrase in the thick ascending limb
Correct: A - Increased excretion of H+ as titratable acid via phosphate buffering
Rationale:In chronic respiratory acidosis, the kidneys increase excretion of H+ as titratable
acid (primarily bound to phosphate) and as NH4+, while also increasing HCO3 reabsorption.
However, the most direct mechanism for generating new HCO3 is the excretion of titratable
acid, which is coupled to HCO3 synthesis. Option B is part of the response but not the
primary generator of new HCO3. Option C is opposite (NH4+ excretion increases). Option D
is not a major compensatory mechanism.
Q2.
A researcher measures the following in a nephron segment: luminal fluid osmolality
decreases from 300 to 100 mOsm/kg while the tubular fluid volume decreases by 15%.
Which segment is most likely being examined?
A. Proximal convoluted tubule B. Descending limb of the loop of Henle
C. Ascending limb of the loop of Henle D. Collecting duct in the presence of ADH
Correct: C - Ascending limb of the loop of Henle
Rationale:The thick ascending limb is impermeable to water but actively transports NaCl out,
diluting the tubular fluid (osmolality falls) while volume decreases only slightly due to water
reabsorption in the preceding segments. The proximal tubule reabsorbs isotonic fluid, so
osmolality stays ~300. The descending limb is permeable to water, so osmolality increases.
The collecting duct with ADH would show increased osmolality due to water reabsorption.
Page 3
, Section A - BIOL 252 Human Anatomy & Physiology II W/lab Module 1 Actual Portage Learning 2026/2027 Academic YEAR AND Human
Anatomy & Physiology II WITH LAB Undergraduate YEAR 3 Advanced
Q3.
Which of the following best explains why the partial pressure of oxygen (PO2) in the
alveoli is lower than in inspired air, even in a healthy individual at rest?
A. Oxygen diffuses rapidly into the B. Inspired air is humidified and mixed with
pulmonary capillary blood, leaving less in alveolar gas that has a lower PO2 due to O2
the alveolar space consumption
C. The anatomical dead space retains a D. Nitrogen in the inspired air displaces
large volume of oxygen-poor air from the oxygen from the alveolar space
previous expiration
Correct: B - Inspired air is humidified and mixed with alveolar gas that has a lower PO2
due to O2 consumption
Rationale:Alveolar PO2 is lower than inspired PO2 primarily because inspired air is
humidified (water vapor dilutes gases) and because oxygen is continuously taken up by the
blood, lowering the alveolar PO2 relative to the dry inspired gas. Option A is a consequence,
not the primary explanation. Option C is minor and not the main factor. Option D is incorrect;
nitrogen does not displace oxygen in the steady state.
Q4.
A drug inhibits the sodium-glucose cotransporter (SGLT2) in the proximal tubule. Which
acute change in renal function is expected?
A. Decreased glucose excretion and B. Increased glucose excretion and
increased urine osmolality decreased urine osmolality
C. Increased glucose excretion and D. Decreased glucose excretion and
increased urine osmolality decreased urine osmolality
Correct: C - Increased glucose excretion and increased urine osmolality
Rationale:SGLT2 inhibition blocks glucose reabsorption, leading to glucosuria. The
osmotically active glucose in the tubular fluid retains water, increasing urine volume and
decreasing urine osmolality? Actually, glucose in urine raises urine osmolality because it is an
osmotically active solute. The presence of glucose increases urine osmolality, but also
increases water loss. The question asks about osmolality: glucose is a solute, so it increases
osmolality. Thus, increased glucose excretion and increased urine osmolality. Option B is
wrong because osmolality would increase, not decrease.
Q5.
A patient has a pulmonary embolism that blocks blood flow to a lung segment. Which
immediate change occurs in that segment?
A. Alveolar PO2 increases and alveolar B. Alveolar PO2 decreases and alveolar
PCO2 decreases PCO2 increases
Page 4
1 ACTUAL EXAM - PORTAGE LEARNING - 2026/2027 ACADEMIC
YEAR - VERIFIED QUESTIONS AND ANSWERS
182 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 252 HUMAN ANATOMY & PHYSIOLOGY II W/LAB MODULE 1 ACTUAL EXAM - PORTAGE LEARNING -
2026/2027 ACADEMIC YEAR - VERIFIED QUESTIONS AND ANSWERS. It contains 182 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 182 Questions
Foundations - Application - BIOL 252 Human Anatomy & Physiology II W/lab Module 1 Actual Portage
Learning 2026/2027 Academic YEAR AND Human Anatomy & Physiology II WITH LAB Undergraduate YEAR
3 Advanced
All answers with rationales
,Table of Contents
Content Area Questions Key Topics
BIOL 252 Human Anatomy & 1-31 Pressure, Explains, Describes, Directly Responsible, Renal
Physiology II W/lab Module 1
Actual Portage Learning
2026/2027 Academic YEAR
AND Human Anatomy &
Physiology II WITH LAB
Undergraduate YEAR 3
Advanced
Likely 32-62 Primary, Chronic, Renal, Arterial, Normal
Pressure 63-93 Cardiac, Likely, Explains, Ventricular, Blood
Blood 94-124 Explains, Renal, Plasma, Glomerular, Likely
Chronic 125-155 Explains, Likely, Change, Respiratory, Pressure
Renal 156-182 Explains, Blood, Likely, Chronic, Mechanism
TOTAL 182 All questions include answers and detailed rationales
,Section A - BIOL 252 Human Anatomy & Physiology II
W/lab Module 1 Actual Portage Learning 2026/2027
Academic YEAR AND Human Anatomy & Physiology II
WITH LAB Undergraduate YEAR 3 Advanced
Q1.
A patient with chronic hypoventilation develops respiratory acidosis. Over 48 hours, the
kidneys compensate. Which renal response is most directly responsible for the
compensatory increase in plasma bicarbonate concentration?
A. Increased excretion of H+ as titratable B. Increased reabsorption of filtered HCO3
acid via phosphate buffering in the proximal tubule
C. Decreased excretion of NH4+ into the D. Increased synthesis of carbonic
tubular lumen anhydrase in the thick ascending limb
Correct: A - Increased excretion of H+ as titratable acid via phosphate buffering
Rationale:In chronic respiratory acidosis, the kidneys increase excretion of H+ as titratable
acid (primarily bound to phosphate) and as NH4+, while also increasing HCO3 reabsorption.
However, the most direct mechanism for generating new HCO3 is the excretion of titratable
acid, which is coupled to HCO3 synthesis. Option B is part of the response but not the
primary generator of new HCO3. Option C is opposite (NH4+ excretion increases). Option D
is not a major compensatory mechanism.
Q2.
A researcher measures the following in a nephron segment: luminal fluid osmolality
decreases from 300 to 100 mOsm/kg while the tubular fluid volume decreases by 15%.
Which segment is most likely being examined?
A. Proximal convoluted tubule B. Descending limb of the loop of Henle
C. Ascending limb of the loop of Henle D. Collecting duct in the presence of ADH
Correct: C - Ascending limb of the loop of Henle
Rationale:The thick ascending limb is impermeable to water but actively transports NaCl out,
diluting the tubular fluid (osmolality falls) while volume decreases only slightly due to water
reabsorption in the preceding segments. The proximal tubule reabsorbs isotonic fluid, so
osmolality stays ~300. The descending limb is permeable to water, so osmolality increases.
The collecting duct with ADH would show increased osmolality due to water reabsorption.
Page 3
, Section A - BIOL 252 Human Anatomy & Physiology II W/lab Module 1 Actual Portage Learning 2026/2027 Academic YEAR AND Human
Anatomy & Physiology II WITH LAB Undergraduate YEAR 3 Advanced
Q3.
Which of the following best explains why the partial pressure of oxygen (PO2) in the
alveoli is lower than in inspired air, even in a healthy individual at rest?
A. Oxygen diffuses rapidly into the B. Inspired air is humidified and mixed with
pulmonary capillary blood, leaving less in alveolar gas that has a lower PO2 due to O2
the alveolar space consumption
C. The anatomical dead space retains a D. Nitrogen in the inspired air displaces
large volume of oxygen-poor air from the oxygen from the alveolar space
previous expiration
Correct: B - Inspired air is humidified and mixed with alveolar gas that has a lower PO2
due to O2 consumption
Rationale:Alveolar PO2 is lower than inspired PO2 primarily because inspired air is
humidified (water vapor dilutes gases) and because oxygen is continuously taken up by the
blood, lowering the alveolar PO2 relative to the dry inspired gas. Option A is a consequence,
not the primary explanation. Option C is minor and not the main factor. Option D is incorrect;
nitrogen does not displace oxygen in the steady state.
Q4.
A drug inhibits the sodium-glucose cotransporter (SGLT2) in the proximal tubule. Which
acute change in renal function is expected?
A. Decreased glucose excretion and B. Increased glucose excretion and
increased urine osmolality decreased urine osmolality
C. Increased glucose excretion and D. Decreased glucose excretion and
increased urine osmolality decreased urine osmolality
Correct: C - Increased glucose excretion and increased urine osmolality
Rationale:SGLT2 inhibition blocks glucose reabsorption, leading to glucosuria. The
osmotically active glucose in the tubular fluid retains water, increasing urine volume and
decreasing urine osmolality? Actually, glucose in urine raises urine osmolality because it is an
osmotically active solute. The presence of glucose increases urine osmolality, but also
increases water loss. The question asks about osmolality: glucose is a solute, so it increases
osmolality. Thus, increased glucose excretion and increased urine osmolality. Option B is
wrong because osmolality would increase, not decrease.
Q5.
A patient has a pulmonary embolism that blocks blood flow to a lung segment. Which
immediate change occurs in that segment?
A. Alveolar PO2 increases and alveolar B. Alveolar PO2 decreases and alveolar
PCO2 decreases PCO2 increases
Page 4
