NU 545 UNIT 3: ENDOCRINE, REPRODUCTIVE, & STIS
QUESTIONS AND ANSWERS WITH COMPLETE
SOLUTION NEW UPDATE 2026-2027 GRADED A+
49 QUESTIONS
TABLE OF CONTENTS
# TOPIC
1 Analyze hormonal feedback loops and endocrine pathologies using advanced pathophysiologic reasoning
2 Evaluate reproductive disorders and STI management using current national guidelines and
pharmacologic principles
3 Synthesize diagnostic data to formulate prioritized, evidence-based clinical decisions across endocrine
and reproductive systems
4 NU 545 Unit 3
5 Endocrine
6 Reproductive
7 & STIs Questions and Answers with Complete Solution New Update 2026
8 2027 Graded A+
9 Foundations of Endocrine, Reproductive, and Sexually Transmitted Infections
10 Applied Endocrine, Reproductive, and Sexually Transmitted Infections
11 Advanced Endocrine, Reproductive, and Sexually Transmitted Infections
12 Endocrine, Reproductive, and Sexually Transmitted Infections Review
ABSTRACT
Page 1
,This study document brings together 49 carefully worded exam questions drawn from NU 545 Unit
3: Endocrine, Reproductive, & STIs Questions and Answers with Complete Solution New Update
2026-2027 Graded A+, with the strongest emphasis placed on Analyze hormonal feedback loops
and endocrine pathologies using advanced pathophysiologic reasoning, Evaluate reproductive
disorders and STI management using current national guidelines and pharmacologic principles,
Synthesize diagnostic data to formulate prioritized and evidence-based clinical decisions across
endocrine and reproductive systems. Every item follows the wording style and level of reasoning
you meet in the real paper, and each one is paired with a clear rationale so the correct choice is
never a guess. Work through the set at your own pace, mark the questions that slow you down,
then come back to them until the reasoning feels automatic. Learners who revise this way walk into
the exam room recognising the pattern behind the questions instead of meeting them for the first
time. Keep going - steady, honest practice is what turns a difficult paper into a comfortable pass.
Q1 ANALYZE HORMONAL FEEDBACK LOOPS AND ENDOCRINE PATHOLOGIES USING
ADVANCED PATHOPHYSIOLOGIC REASONING
A patient with primary hyperaldosteronism is started on spironolactone. Which
laboratory trend best confirms therapeutic efficacy while minimizing hyperkalemia
risk?
A. Rising serum potassium with normalization of the aldosterone-to-renin ratio
B. Falling serum potassium with rising plasma renin activity CORRECT
C. Rising serum sodium with suppressed plasma renin activity
D. Falling serum bicarbonate with normalization of serum potassium
RATIONALE: Spironolactone blocks aldosterone receptors, which should lower blood pressure,
normalize potassium, and-because the renin-angiotensin system is no longer
suppressed-increase plasma renin activity. Option A is incorrect because the aldosterone-to-renin
ratio typically remains elevated in primary hyperaldosteronism. Option C reflects continued
aldosterone effect, and option D suggests metabolic acidosis, which is not the therapeutic goal.
Page 2
, Q2 ANALYZE HORMONAL FEEDBACK LOOPS AND ENDOCRINE PATHOLOGIES USING
ADVANCED PATHOPHYSIOLOGIC REASONING
Which molecular mechanism best explains why combined oral contraceptives
remain effective despite variable absorption of ethinyl estradiol?
A. Progestin-mediated suppression of gonadotropin-releasing hormone pulsatility is the primary
contraceptive mechanism. CORRECT
B. Ethinyl estradiol's 17-ethinyl group resists first-pass metabolism, ensuring consistent hepatic
delivery.
C. Enterohepatic recirculation of estradiol metabolites provides a sustained estrogen reservoir.
D. Progesterone receptor antagonism at the endometrium prevents implantation independent of
ovulation.
RATIONALE: The dominant contraceptive effect of combined oral contraceptives is
progestin-induced suppression of GnRH pulsatility, which inhibits the LH surge and ovulation.
While the 17-ethinyl group does slow hepatic metabolism (making option B partially true), it is not
the primary reason for contraceptive efficacy. Options C and D describe mechanisms that are not
the principal basis for contraceptive effectiveness.
Q3 ANALYZE HORMONAL FEEDBACK LOOPS AND ENDOCRINE PATHOLOGIES USING
ADVANCED PATHOPHYSIOLOGIC REASONING
A patient with type 1 diabetes and gastroparesis is prescribed pramlintide. Which
concurrent medication adjustment is most critical to prevent severe
hypoglycemia?
A. Reduce prandial insulin dose by 50% CORRECT
B. Increase basal insulin by 20%
C. Add a DPP-4 inhibitor
D. Switch from insulin glargine to NPH
RATIONALE: Pramlintide slows gastric emptying and suppresses glucagon, which reduces
postprandial glucose excursions; prandial insulin must be reduced by approximately 50% to
avoid hypoglycemia. Increasing basal insulin (B) would worsen hypoglycemia risk. Adding a
DPP-4 inhibitor (C) does not address the immediate insulin adjustment, and switching to NPH (D)
does not mitigate the pramlintide effect.
Page 3
QUESTIONS AND ANSWERS WITH COMPLETE
SOLUTION NEW UPDATE 2026-2027 GRADED A+
49 QUESTIONS
TABLE OF CONTENTS
# TOPIC
1 Analyze hormonal feedback loops and endocrine pathologies using advanced pathophysiologic reasoning
2 Evaluate reproductive disorders and STI management using current national guidelines and
pharmacologic principles
3 Synthesize diagnostic data to formulate prioritized, evidence-based clinical decisions across endocrine
and reproductive systems
4 NU 545 Unit 3
5 Endocrine
6 Reproductive
7 & STIs Questions and Answers with Complete Solution New Update 2026
8 2027 Graded A+
9 Foundations of Endocrine, Reproductive, and Sexually Transmitted Infections
10 Applied Endocrine, Reproductive, and Sexually Transmitted Infections
11 Advanced Endocrine, Reproductive, and Sexually Transmitted Infections
12 Endocrine, Reproductive, and Sexually Transmitted Infections Review
ABSTRACT
Page 1
,This study document brings together 49 carefully worded exam questions drawn from NU 545 Unit
3: Endocrine, Reproductive, & STIs Questions and Answers with Complete Solution New Update
2026-2027 Graded A+, with the strongest emphasis placed on Analyze hormonal feedback loops
and endocrine pathologies using advanced pathophysiologic reasoning, Evaluate reproductive
disorders and STI management using current national guidelines and pharmacologic principles,
Synthesize diagnostic data to formulate prioritized and evidence-based clinical decisions across
endocrine and reproductive systems. Every item follows the wording style and level of reasoning
you meet in the real paper, and each one is paired with a clear rationale so the correct choice is
never a guess. Work through the set at your own pace, mark the questions that slow you down,
then come back to them until the reasoning feels automatic. Learners who revise this way walk into
the exam room recognising the pattern behind the questions instead of meeting them for the first
time. Keep going - steady, honest practice is what turns a difficult paper into a comfortable pass.
Q1 ANALYZE HORMONAL FEEDBACK LOOPS AND ENDOCRINE PATHOLOGIES USING
ADVANCED PATHOPHYSIOLOGIC REASONING
A patient with primary hyperaldosteronism is started on spironolactone. Which
laboratory trend best confirms therapeutic efficacy while minimizing hyperkalemia
risk?
A. Rising serum potassium with normalization of the aldosterone-to-renin ratio
B. Falling serum potassium with rising plasma renin activity CORRECT
C. Rising serum sodium with suppressed plasma renin activity
D. Falling serum bicarbonate with normalization of serum potassium
RATIONALE: Spironolactone blocks aldosterone receptors, which should lower blood pressure,
normalize potassium, and-because the renin-angiotensin system is no longer
suppressed-increase plasma renin activity. Option A is incorrect because the aldosterone-to-renin
ratio typically remains elevated in primary hyperaldosteronism. Option C reflects continued
aldosterone effect, and option D suggests metabolic acidosis, which is not the therapeutic goal.
Page 2
, Q2 ANALYZE HORMONAL FEEDBACK LOOPS AND ENDOCRINE PATHOLOGIES USING
ADVANCED PATHOPHYSIOLOGIC REASONING
Which molecular mechanism best explains why combined oral contraceptives
remain effective despite variable absorption of ethinyl estradiol?
A. Progestin-mediated suppression of gonadotropin-releasing hormone pulsatility is the primary
contraceptive mechanism. CORRECT
B. Ethinyl estradiol's 17-ethinyl group resists first-pass metabolism, ensuring consistent hepatic
delivery.
C. Enterohepatic recirculation of estradiol metabolites provides a sustained estrogen reservoir.
D. Progesterone receptor antagonism at the endometrium prevents implantation independent of
ovulation.
RATIONALE: The dominant contraceptive effect of combined oral contraceptives is
progestin-induced suppression of GnRH pulsatility, which inhibits the LH surge and ovulation.
While the 17-ethinyl group does slow hepatic metabolism (making option B partially true), it is not
the primary reason for contraceptive efficacy. Options C and D describe mechanisms that are not
the principal basis for contraceptive effectiveness.
Q3 ANALYZE HORMONAL FEEDBACK LOOPS AND ENDOCRINE PATHOLOGIES USING
ADVANCED PATHOPHYSIOLOGIC REASONING
A patient with type 1 diabetes and gastroparesis is prescribed pramlintide. Which
concurrent medication adjustment is most critical to prevent severe
hypoglycemia?
A. Reduce prandial insulin dose by 50% CORRECT
B. Increase basal insulin by 20%
C. Add a DPP-4 inhibitor
D. Switch from insulin glargine to NPH
RATIONALE: Pramlintide slows gastric emptying and suppresses glucagon, which reduces
postprandial glucose excursions; prandial insulin must be reduced by approximately 50% to
avoid hypoglycemia. Increasing basal insulin (B) would worsen hypoglycemia risk. Adding a
DPP-4 inhibitor (C) does not address the immediate insulin adjustment, and switching to NPH (D)
does not mitigate the pramlintide effect.
Page 3
