Page 1 of 122
WGU D120 OA EXAM WITH VERIFIED ANSWERS DETAILED
RATIONALES GRADED A+
WGU D120 OA – Special Populations Primary Care for the Advanced Practice Nurse
SECTION 1: HEALTH PROMOTION & DISEASE PREVENTION (Questions 1–40)
Question 1. In a primary care setting, which physiological change in pregnancy most
significantly alters the pharmacokinetics of renally cleared medications, requiring dose
adjustment?
A) Increased glomerular filtration rate and renal plasma flow
B) Decreased plasma albumin concentration
C) Increased hepatic blood flow and enzyme induction
D) Expanded extracellular fluid volume
Answer: A
Rationale: During pregnancy, GFR increases by up to 50%, enhancing renal clearance of drugs
excreted unchanged. While albumin dilution and hepatic changes also occur, renal clearance is
the dominant factor for renally cleared drugs. Extracellular fluid volume affects distribution, not
clearance.
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Question 2. A patient with a history of recurrent Clostridioides difficile infection (CDI) requires
antibiotic therapy for a urinary tract infection. Which agent is least likely to precipitate CDI
recurrence?
A) Ciprofloxacin
B) Nitrofurantoin
C) Amoxicillin-clavulanate
D) Cefpodoxime
Answer: B
Rationale: Nitrofurantoin has a narrow spectrum of activity and minimal effect on gut flora,
making it least likely to precipitate CDI recurrence. Fluoroquinolones, amoxicillin-clavulanate,
and cephalosporins all have broader spectra and higher CDI risk.
Question 3. A 21-year-old female presents for her first well-woman exam. She has never been
sexually active. Her family and medical history are negative for gynecologic diseases. Her
menses occur every 28 days, lasting 5 days, with moderate flow and no significant
dysmenorrhea. Which tests should be included in her physical exam?
A) Pap smear, STD screening, hemoccult, and mammogram
B) Pap smear only
C) Pap smear
D) No testing is needed
Answer: C
Rationale: The recommended age for females to begin screening Pap smears is 21, regardless of
sexual activity history. STD screening is not necessary as the patient is not sexually active.
Hemoccult and mammogram are not recommended for this age group.
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Question 4. A 67-year-old woman asks the APRN when her next Pap smear should be
performed. The APRN notes that the client has had three consecutive negative cytology results.
Which schedule should the APRN recommend for this patient?
A) Every three years
B) Every five years
C) Annually
D) Ongoing cervical cytology is not necessary
Answer: D
Rationale: According to current USPSTF guidelines, women over age 65 who have had three
consecutive negative Pap smears (or two negative co-tests) within the past 10 years, with the
most recent test within the past 5 years, and no history of cervical intraepithelial neoplasia
grade 2 or higher, may discontinue cervical cancer screening.
Question 5. A 21-year-old female patient presents to the clinic for a routine exam and asks the
APRN about the recommended frequency for a Pap smear. Which recommendation should the
APRN share with this patient?
A) Annually
B) Every three years
C) Every five years
D) Every two years
Answer: B
Rationale: For women aged 21-29, the USPSTF recommends cervical cancer screening with
cytology alone every 3 years.
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Question 6. A 35-year-old woman presents for a well-woman exam. She has no history of
abnormal Pap smears. Which cervical cancer screening strategy is recommended for this
patient?
A) Cytology alone every 3 years
B) HPV testing alone every 5 years
C) Cytology plus HPV co-testing every 5 years
D) Annual cytology
Answer: C
Rationale: For women aged 30-65, the USPSTF recommends screening with cytology plus HPV
co-testing every 5 years, cytology alone every 3 years, or HPV testing alone every 5 years.
Question 7. A 45-year-old woman with obesity (BMI 34) presents for health promotion
counseling. Which condition is she at highest risk for developing?
A) Type 1 diabetes mellitus
B) Type 2 diabetes mellitus
C) Osteoporosis
D) Anemia
Answer: B
Rationale: Obesity is a major risk factor for type 2 diabetes mellitus due to insulin resistance.
BMI ≥30 significantly increases the risk of developing T2DM.
Question 8. A 60-year-old man presents for a routine health maintenance visit. Which cancer
screening is recommended for this patient?
A) Prostate-specific antigen (PSA) testing
B) Colonoscopy every 10 years
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WGU D120 OA EXAM WITH VERIFIED ANSWERS DETAILED
RATIONALES GRADED A+
WGU D120 OA – Special Populations Primary Care for the Advanced Practice Nurse
SECTION 1: HEALTH PROMOTION & DISEASE PREVENTION (Questions 1–40)
Question 1. In a primary care setting, which physiological change in pregnancy most
significantly alters the pharmacokinetics of renally cleared medications, requiring dose
adjustment?
A) Increased glomerular filtration rate and renal plasma flow
B) Decreased plasma albumin concentration
C) Increased hepatic blood flow and enzyme induction
D) Expanded extracellular fluid volume
Answer: A
Rationale: During pregnancy, GFR increases by up to 50%, enhancing renal clearance of drugs
excreted unchanged. While albumin dilution and hepatic changes also occur, renal clearance is
the dominant factor for renally cleared drugs. Extracellular fluid volume affects distribution, not
clearance.
1|Page
,Page 2 of 122
Question 2. A patient with a history of recurrent Clostridioides difficile infection (CDI) requires
antibiotic therapy for a urinary tract infection. Which agent is least likely to precipitate CDI
recurrence?
A) Ciprofloxacin
B) Nitrofurantoin
C) Amoxicillin-clavulanate
D) Cefpodoxime
Answer: B
Rationale: Nitrofurantoin has a narrow spectrum of activity and minimal effect on gut flora,
making it least likely to precipitate CDI recurrence. Fluoroquinolones, amoxicillin-clavulanate,
and cephalosporins all have broader spectra and higher CDI risk.
Question 3. A 21-year-old female presents for her first well-woman exam. She has never been
sexually active. Her family and medical history are negative for gynecologic diseases. Her
menses occur every 28 days, lasting 5 days, with moderate flow and no significant
dysmenorrhea. Which tests should be included in her physical exam?
A) Pap smear, STD screening, hemoccult, and mammogram
B) Pap smear only
C) Pap smear
D) No testing is needed
Answer: C
Rationale: The recommended age for females to begin screening Pap smears is 21, regardless of
sexual activity history. STD screening is not necessary as the patient is not sexually active.
Hemoccult and mammogram are not recommended for this age group.
2|Page
,Page 3 of 122
Question 4. A 67-year-old woman asks the APRN when her next Pap smear should be
performed. The APRN notes that the client has had three consecutive negative cytology results.
Which schedule should the APRN recommend for this patient?
A) Every three years
B) Every five years
C) Annually
D) Ongoing cervical cytology is not necessary
Answer: D
Rationale: According to current USPSTF guidelines, women over age 65 who have had three
consecutive negative Pap smears (or two negative co-tests) within the past 10 years, with the
most recent test within the past 5 years, and no history of cervical intraepithelial neoplasia
grade 2 or higher, may discontinue cervical cancer screening.
Question 5. A 21-year-old female patient presents to the clinic for a routine exam and asks the
APRN about the recommended frequency for a Pap smear. Which recommendation should the
APRN share with this patient?
A) Annually
B) Every three years
C) Every five years
D) Every two years
Answer: B
Rationale: For women aged 21-29, the USPSTF recommends cervical cancer screening with
cytology alone every 3 years.
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, Page 4 of 122
Question 6. A 35-year-old woman presents for a well-woman exam. She has no history of
abnormal Pap smears. Which cervical cancer screening strategy is recommended for this
patient?
A) Cytology alone every 3 years
B) HPV testing alone every 5 years
C) Cytology plus HPV co-testing every 5 years
D) Annual cytology
Answer: C
Rationale: For women aged 30-65, the USPSTF recommends screening with cytology plus HPV
co-testing every 5 years, cytology alone every 3 years, or HPV testing alone every 5 years.
Question 7. A 45-year-old woman with obesity (BMI 34) presents for health promotion
counseling. Which condition is she at highest risk for developing?
A) Type 1 diabetes mellitus
B) Type 2 diabetes mellitus
C) Osteoporosis
D) Anemia
Answer: B
Rationale: Obesity is a major risk factor for type 2 diabetes mellitus due to insulin resistance.
BMI ≥30 significantly increases the risk of developing T2DM.
Question 8. A 60-year-old man presents for a routine health maintenance visit. Which cancer
screening is recommended for this patient?
A) Prostate-specific antigen (PSA) testing
B) Colonoscopy every 10 years
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