BIOS 255 ANATOMY & PHYSIOLOGY III EXAM 2 CHAMBERLAIN ACTUAL
2026/2027 - COMPLETE QUESTIONS WITH DETAILED RATIONALES 100%
VERIFIED ANSWERS - PASS GUARANTEED - A+ GRADED
180 QUESTIONS
TABLE OF CONTENTS
# TOPIC
1 Analyze homeostatic regulatory mechanisms across multiple organ systems
2 Integrate anatomical structures with physiological functions in complex scenarios
3 Evaluate clinical implications of physiological imbalances and interventions
4 Apply quantitative and qualitative reasoning to interpret physiological data
5 BIOS 255 Anatomy & Physiology III Exam 2 Chamberlain Actual 2026
6 2027
7 Complete Questions with Detailed Rationales 100% Verified Answers
8 Pass Guaranteed
9 A+ Graded
10 Foundations of Anatomy & Physiology III (BIOS 255)
11 Applied Anatomy & Physiology III (BIOS 255)
12 Advanced Anatomy & Physiology III (BIOS 255)
13 Anatomy & Physiology III (BIOS 255) Review
Page 1
,Q1 ANALYZE HOMEOSTATIC REGULATORY MECHANISMS ACROSS MULTIPLE ORGAN
SYSTEMS
A researcher is investigating the effect of a novel drug on the renal handling of
potassium. The drug inhibits the apical Na+/K+/2Cl- cotransporter in the thick
ascending limb. Which of the following changes in renal potassium handling
would be most expected?
A. Decreased potassium secretion in the distal nephron due to reduced distal sodium delivery
B. Increased potassium secretion in the distal nephron due to increased distal sodium delivery
CORRECT
C. Decreased potassium reabsorption in the proximal tubule due to reduced Na+/K+ ATPase
activity
D. Increased potassium reabsorption in the collecting duct due to enhanced aldosterone release
RATIONALE: Inhibition of the Na+/K+/2Cl- cotransporter in the thick ascending limb reduces
sodium reabsorption, leading to increased sodium and fluid delivery to the distal nephron. This
stimulates aldosterone-independent potassium secretion in the principal cells, enhancing K+ loss.
Other options misidentify the site or mechanism.
Q2 ANALYZE HOMEOSTATIC REGULATORY MECHANISMS ACROSS MULTIPLE ORGAN
SYSTEMS
In a patient with chronic respiratory acidosis, which renal compensatory response
would be most indicative of maximal compensation?
A. Increased renal bicarbonate reabsorption and increased hydrogen ion secretion CORRECT
B. Decreased renal bicarbonate reabsorption and increased hydrogen ion secretion
C. Increased renal bicarbonate excretion and decreased hydrogen ion secretion
D. Decreased renal bicarbonate reabsorption and decreased hydrogen ion secretion
RATIONALE: Chronic respiratory acidosis causes the kidneys to retain bicarbonate and excrete
hydrogen ions to compensate for the elevated CO2. This is achieved by increased reabsorption
of filtered HCO3- and increased net acid excretion. Options B-D would worsen or fail to correct
the acidosis.
Page 2
,Q3 ANALYZE HOMEOSTATIC REGULATORY MECHANISMS ACROSS MULTIPLE ORGAN
SYSTEMS
Which of the following best explains why the partial pressure of oxygen in the
alveoli is lower than in the inspired air?
A. Oxygen is continuously removed by pulmonary capillary blood
B. Inspired air is humidified and mixed with alveolar gas containing CO2 CORRECT
C. The respiratory quotient is less than 1, reducing oxygen concentration
D. Dead space ventilation dilutes the oxygen entering the alveoli
RATIONALE: Alveolar PO2 is lower than inspired PO2 because inspired air is humidified (water
vapor dilutes gases) and mixes with CO2 that diffuses from the blood into the alveoli. Oxygen
removal by blood does not lower the partial pressure in a steady state; RQ affects the relative
changes, but the primary reason is the addition of CO2 and water vapor.
Q4 ANALYZE HOMEOSTATIC REGULATORY MECHANISMS ACROSS MULTIPLE ORGAN
SYSTEMS
A patient with a severe gastrointestinal bleed presents with tachycardia and
hypotension. Which of the following hormonal responses would be most expected
to increase renal sodium and water retention?
A. Increased atrial natriuretic peptide (ANP) and decreased aldosterone
B. Increased aldosterone and increased antidiuretic hormone (ADH) CORRECT
C. Decreased renin and decreased ADH
D. Increased cortisol and decreased aldosterone
RATIONALE: Hypovolemia triggers the renin-angiotensin-aldosterone system, increasing
aldosterone to promote sodium reabsorption, and also stimulates ADH release to conserve
water. ANP would be decreased, not increased. Cortisol does not directly increase sodium
retention to the same extent, and aldosterone is elevated, not decreased.
Page 3
, Q5 ANALYZE HOMEOSTATIC REGULATORY MECHANISMS ACROSS MULTIPLE ORGAN
SYSTEMS
Which of the following best describes the role of the hepatic portal system in
nutrient processing?
A. It delivers oxygenated blood directly to hepatocytes for metabolism
B. It carries nutrient-rich blood from the gastrointestinal tract to the liver for processing
CORRECT
C. It connects the hepatic artery to the vena cava, bypassing the liver
D. It transports bile from the liver to the gallbladder for storage
RATIONALE: The hepatic portal system carries venous blood from the GI tract, spleen, and
pancreas to the liver, allowing the liver to process absorbed nutrients, detoxify substances, and
regulate blood composition. It does not carry oxygenated blood (that's the hepatic artery), nor
does it bypass the liver or transport bile.
Q6 ANALYZE HOMEOSTATIC REGULATORY MECHANISMS ACROSS MULTIPLE ORGAN
SYSTEMS
A researcher is studying a mutant form of the sodium-glucose cotransporter
(SGLT2) that has increased affinity for glucose but decreased transport maximum.
What is the most likely effect on renal glucose handling?
A. Increased glucose reabsorption and hyperglycemia
B. Decreased glucose reabsorption and glucosuria at normal plasma glucose levels CORRECT
C. No change in glucose reabsorption because SGLT2 is not rate-limiting
D. Increased glucose secretion into the tubule leading to glucosuria
RATIONALE: A decreased transport maximum reduces the capacity to reabsorb glucose, so
even at normal plasma glucose levels, the filtered load may exceed the reduced Tm, leading to
glucosuria. Increased affinity does not compensate for the lower capacity. SGLT2 is the primary
reabsorptive transporter, and glucose is not secreted.
Page 4
2026/2027 - COMPLETE QUESTIONS WITH DETAILED RATIONALES 100%
VERIFIED ANSWERS - PASS GUARANTEED - A+ GRADED
180 QUESTIONS
TABLE OF CONTENTS
# TOPIC
1 Analyze homeostatic regulatory mechanisms across multiple organ systems
2 Integrate anatomical structures with physiological functions in complex scenarios
3 Evaluate clinical implications of physiological imbalances and interventions
4 Apply quantitative and qualitative reasoning to interpret physiological data
5 BIOS 255 Anatomy & Physiology III Exam 2 Chamberlain Actual 2026
6 2027
7 Complete Questions with Detailed Rationales 100% Verified Answers
8 Pass Guaranteed
9 A+ Graded
10 Foundations of Anatomy & Physiology III (BIOS 255)
11 Applied Anatomy & Physiology III (BIOS 255)
12 Advanced Anatomy & Physiology III (BIOS 255)
13 Anatomy & Physiology III (BIOS 255) Review
Page 1
,Q1 ANALYZE HOMEOSTATIC REGULATORY MECHANISMS ACROSS MULTIPLE ORGAN
SYSTEMS
A researcher is investigating the effect of a novel drug on the renal handling of
potassium. The drug inhibits the apical Na+/K+/2Cl- cotransporter in the thick
ascending limb. Which of the following changes in renal potassium handling
would be most expected?
A. Decreased potassium secretion in the distal nephron due to reduced distal sodium delivery
B. Increased potassium secretion in the distal nephron due to increased distal sodium delivery
CORRECT
C. Decreased potassium reabsorption in the proximal tubule due to reduced Na+/K+ ATPase
activity
D. Increased potassium reabsorption in the collecting duct due to enhanced aldosterone release
RATIONALE: Inhibition of the Na+/K+/2Cl- cotransporter in the thick ascending limb reduces
sodium reabsorption, leading to increased sodium and fluid delivery to the distal nephron. This
stimulates aldosterone-independent potassium secretion in the principal cells, enhancing K+ loss.
Other options misidentify the site or mechanism.
Q2 ANALYZE HOMEOSTATIC REGULATORY MECHANISMS ACROSS MULTIPLE ORGAN
SYSTEMS
In a patient with chronic respiratory acidosis, which renal compensatory response
would be most indicative of maximal compensation?
A. Increased renal bicarbonate reabsorption and increased hydrogen ion secretion CORRECT
B. Decreased renal bicarbonate reabsorption and increased hydrogen ion secretion
C. Increased renal bicarbonate excretion and decreased hydrogen ion secretion
D. Decreased renal bicarbonate reabsorption and decreased hydrogen ion secretion
RATIONALE: Chronic respiratory acidosis causes the kidneys to retain bicarbonate and excrete
hydrogen ions to compensate for the elevated CO2. This is achieved by increased reabsorption
of filtered HCO3- and increased net acid excretion. Options B-D would worsen or fail to correct
the acidosis.
Page 2
,Q3 ANALYZE HOMEOSTATIC REGULATORY MECHANISMS ACROSS MULTIPLE ORGAN
SYSTEMS
Which of the following best explains why the partial pressure of oxygen in the
alveoli is lower than in the inspired air?
A. Oxygen is continuously removed by pulmonary capillary blood
B. Inspired air is humidified and mixed with alveolar gas containing CO2 CORRECT
C. The respiratory quotient is less than 1, reducing oxygen concentration
D. Dead space ventilation dilutes the oxygen entering the alveoli
RATIONALE: Alveolar PO2 is lower than inspired PO2 because inspired air is humidified (water
vapor dilutes gases) and mixes with CO2 that diffuses from the blood into the alveoli. Oxygen
removal by blood does not lower the partial pressure in a steady state; RQ affects the relative
changes, but the primary reason is the addition of CO2 and water vapor.
Q4 ANALYZE HOMEOSTATIC REGULATORY MECHANISMS ACROSS MULTIPLE ORGAN
SYSTEMS
A patient with a severe gastrointestinal bleed presents with tachycardia and
hypotension. Which of the following hormonal responses would be most expected
to increase renal sodium and water retention?
A. Increased atrial natriuretic peptide (ANP) and decreased aldosterone
B. Increased aldosterone and increased antidiuretic hormone (ADH) CORRECT
C. Decreased renin and decreased ADH
D. Increased cortisol and decreased aldosterone
RATIONALE: Hypovolemia triggers the renin-angiotensin-aldosterone system, increasing
aldosterone to promote sodium reabsorption, and also stimulates ADH release to conserve
water. ANP would be decreased, not increased. Cortisol does not directly increase sodium
retention to the same extent, and aldosterone is elevated, not decreased.
Page 3
, Q5 ANALYZE HOMEOSTATIC REGULATORY MECHANISMS ACROSS MULTIPLE ORGAN
SYSTEMS
Which of the following best describes the role of the hepatic portal system in
nutrient processing?
A. It delivers oxygenated blood directly to hepatocytes for metabolism
B. It carries nutrient-rich blood from the gastrointestinal tract to the liver for processing
CORRECT
C. It connects the hepatic artery to the vena cava, bypassing the liver
D. It transports bile from the liver to the gallbladder for storage
RATIONALE: The hepatic portal system carries venous blood from the GI tract, spleen, and
pancreas to the liver, allowing the liver to process absorbed nutrients, detoxify substances, and
regulate blood composition. It does not carry oxygenated blood (that's the hepatic artery), nor
does it bypass the liver or transport bile.
Q6 ANALYZE HOMEOSTATIC REGULATORY MECHANISMS ACROSS MULTIPLE ORGAN
SYSTEMS
A researcher is studying a mutant form of the sodium-glucose cotransporter
(SGLT2) that has increased affinity for glucose but decreased transport maximum.
What is the most likely effect on renal glucose handling?
A. Increased glucose reabsorption and hyperglycemia
B. Decreased glucose reabsorption and glucosuria at normal plasma glucose levels CORRECT
C. No change in glucose reabsorption because SGLT2 is not rate-limiting
D. Increased glucose secretion into the tubule leading to glucosuria
RATIONALE: A decreased transport maximum reduces the capacity to reabsorb glucose, so
even at normal plasma glucose levels, the filtered load may exceed the reduced Tm, leading to
glucosuria. Increased affinity does not compensate for the lower capacity. SGLT2 is the primary
reabsorptive transporter, and glucose is not secreted.
Page 4
