NR 511 FINAL EXAM 2026 (THREE DIFFERENT EXAMS) | DIFFERENTIAL
DIAGNOSIS AND PRIMARY CARE | ALL QUESTIONS AND CORRECT ANSWERS |
VERIFIED ANSWERS | GRADED A+
Question 1
Which of the following is considered the most cost-effective initial screening test for determining
a patient's HIV status in a primary care setting?
A) Western Blot
B) Polymerase Chain Reaction (PCR)
C) Enzyme-linked immunosorbent assay (ELISA)
D) CD4 count
E) Rapid p24 antigen test
Correct Answer: C) Enzyme-linked immunosorbent assay (ELISA)
Rationale: The ELISA is highly sensitive and is the standard, cost-effective tool for initial
HIV screening. While a Western Blot or IFA is traditionally used for confirmation after a
positive ELISA, and PCR is used to detect the virus during the "window period" or to
monitor viral load, the ELISA remains the first-line choice for general population screening
due to its low cost and high accuracy in detecting HIV antibodies.
Question 2
A clinician orders a blood test to evaluate the severity and progression of a suspected
inflammatory process. Which of the following is a non-specific marker most helpful for this
purpose?
A) Antinuclear antibody (ANA)
B) C-reactive protein (CRP)
C) Rheumatoid Factor (RF)
D) Thyroid-stimulating hormone (TSH)
E) Prothrombin time (PT)
Correct Answer: B) C-reactive protein (CRP)
Rationale: CRP is an acute-phase reactant produced by the liver. While it does not identify
the specific cause of inflammation, it is a highly sensitive marker that rises rapidly in
response to tissue injury or infection. It is frequently used to monitor the "course" of a
, 2
disease, as levels will drop quickly as the inflammatory process resolves, unlike the
Erythrocyte Sedimentation Rate (ESR), which is slower to change.
Question 3
Cocaine is a powerful central nervous system stimulant. What is its primary mechanism of action
regarding neurotransmitters?
A) Stimulating the release of Acetylcholine
B) Blocking the reuptake of Dopamine
C) Inhibiting the production of Serotonin
D) Increasing the reuptake of Gamma-aminobutyric acid (GABA)
E) Antagonizing Norepinephrine receptors
Correct Answer: B) Blocking the reuptake of Dopamine
Rationale: Cocaine exerts its effects by binding to the dopamine transporter, which prevents
the reabsorption of dopamine from the synaptic cleft into the pre-synaptic neuron. This
results in an accumulation of dopamine, leading to the intense euphoria, increased energy,
and heightened alertness characteristic of cocaine use. Over time, this leads to the depletion
of dopamine and the "crash" associated with the drug.
Question 4
A 45-year-old patient reports pain in her lateral elbow after a week of intensive gardening.
Which physical finding would most effectively differentiate the diagnosis as lateral epicondylitis
(tennis elbow)?
A) Pain at the medial elbow with wrist flexion
B) Numbness in the 4th and 5th digits
C) Pain at the elbow with resisted extension of the wrist and forearm
D) Weakness in the biceps muscle
E) Inability to fully extend the elbow joint
Correct Answer: C) Pain at the elbow with resisted movements at the wrist and forearm
Rationale: Lateral epicondylitis involves the common extensor tendon, particularly the
extensor carpi radialis brevis. Pain is localized to the lateral epicondyle and is exacerbated
by maneuvers that put stress on these tendons, such as resisted wrist extension or
, 3
supination. Pain with resisted wrist flexion would instead point toward medial epicondylitis
(Golfer's elbow).
Question 5
When performing a musculoskeletal examination on a patient with a localized injury, what is the
standard protocol for assessing range of motion and strength?
A) Examine the involved side first to establish a baseline of pain.
B) The uninvolved side should be examined initially and then compared to the involved side.
C) Only examine the involved side to save time.
D) Examine the joints above and below but skip the injured site.
E) Ask the patient to perform heavy lifting to test maximum strength.
Correct Answer: B) The uninvolved side should be examined initially and then compared to
the involved side.
Rationale: Examining the healthy side first allows the clinician to determine the patient's
normal "baseline" for range of motion and strength. This provides a clear point of
comparison for the injured side and helps build the patient's trust before moving to the
painful area. It also helps in identifying subtle deficits that might otherwise be missed.
Question 6
Which of the following clinical indicators is most suggestive of an inflammatory, rather than
mechanical, etiology for musculoskeletal pain?
A) Pain that worsens with activity
B) Localized tenderness without swelling
C) Morning stiffness lasting more than 30–60 minutes
D) Relief of pain with cold compresses
E) Crepitus upon movement of the joint
Correct Answer: C) Morning stiffness
Rationale: Morning stiffness is a classic hallmark of inflammatory conditions like
Rheumatoid Arthritis. In inflammatory diseases, joint stiffness is usually prolonged (often
over an hour) and improves as the patient moves. In mechanical conditions like
, 4
Osteoarthritis, stiffness is usually brief (less than 30 minutes) and the pain typically
worsens with increased activity throughout the day.
Question 7
Statistically, which animal is responsible for the greatest percentage of mammalian bite injuries
reported in the United States?
A) Cats
B) Bats
C) Raccoons
) Humans
E) Dogs
Correct Answer: E) Dogs
Rationale: Dog bites account for approximately 80% to 90% of all mammalian bites
reported to emergency departments. While cat bites carry a higher risk of infection due to
the "puncture" nature of the wound and the prevalence of Pasteurella multocida, dog bites
are more frequent and often cause more significant crush and tissue damage.
Question 8
A 48-year-old woman presents with heavy menstrual periods (menorrhagia) and paleness. A
pelvic exam reveals a single large midline mass. Which diagnostic test is the priority?
A) Abdominal CT scan
B) Endometrial biopsy
C) Transvaginal ultrasound
D) Serum HCG level
E) Hysterosalpingogram
Correct Answer: C) Transvaginal ultrasound
Rationale: Transvaginal ultrasound is the imaging modality of choice for evaluating the
uterus and ovaries. In this case, the clinician is looking for leiomyomas (uterine fibroids),
which are the most common cause of a large, firm, midline uterine mass and heavy
bleeding in women of this age group. Ultrasound is non-invasive, cost-effective, and highly
accurate for sizing and locating fibroids.
DIAGNOSIS AND PRIMARY CARE | ALL QUESTIONS AND CORRECT ANSWERS |
VERIFIED ANSWERS | GRADED A+
Question 1
Which of the following is considered the most cost-effective initial screening test for determining
a patient's HIV status in a primary care setting?
A) Western Blot
B) Polymerase Chain Reaction (PCR)
C) Enzyme-linked immunosorbent assay (ELISA)
D) CD4 count
E) Rapid p24 antigen test
Correct Answer: C) Enzyme-linked immunosorbent assay (ELISA)
Rationale: The ELISA is highly sensitive and is the standard, cost-effective tool for initial
HIV screening. While a Western Blot or IFA is traditionally used for confirmation after a
positive ELISA, and PCR is used to detect the virus during the "window period" or to
monitor viral load, the ELISA remains the first-line choice for general population screening
due to its low cost and high accuracy in detecting HIV antibodies.
Question 2
A clinician orders a blood test to evaluate the severity and progression of a suspected
inflammatory process. Which of the following is a non-specific marker most helpful for this
purpose?
A) Antinuclear antibody (ANA)
B) C-reactive protein (CRP)
C) Rheumatoid Factor (RF)
D) Thyroid-stimulating hormone (TSH)
E) Prothrombin time (PT)
Correct Answer: B) C-reactive protein (CRP)
Rationale: CRP is an acute-phase reactant produced by the liver. While it does not identify
the specific cause of inflammation, it is a highly sensitive marker that rises rapidly in
response to tissue injury or infection. It is frequently used to monitor the "course" of a
, 2
disease, as levels will drop quickly as the inflammatory process resolves, unlike the
Erythrocyte Sedimentation Rate (ESR), which is slower to change.
Question 3
Cocaine is a powerful central nervous system stimulant. What is its primary mechanism of action
regarding neurotransmitters?
A) Stimulating the release of Acetylcholine
B) Blocking the reuptake of Dopamine
C) Inhibiting the production of Serotonin
D) Increasing the reuptake of Gamma-aminobutyric acid (GABA)
E) Antagonizing Norepinephrine receptors
Correct Answer: B) Blocking the reuptake of Dopamine
Rationale: Cocaine exerts its effects by binding to the dopamine transporter, which prevents
the reabsorption of dopamine from the synaptic cleft into the pre-synaptic neuron. This
results in an accumulation of dopamine, leading to the intense euphoria, increased energy,
and heightened alertness characteristic of cocaine use. Over time, this leads to the depletion
of dopamine and the "crash" associated with the drug.
Question 4
A 45-year-old patient reports pain in her lateral elbow after a week of intensive gardening.
Which physical finding would most effectively differentiate the diagnosis as lateral epicondylitis
(tennis elbow)?
A) Pain at the medial elbow with wrist flexion
B) Numbness in the 4th and 5th digits
C) Pain at the elbow with resisted extension of the wrist and forearm
D) Weakness in the biceps muscle
E) Inability to fully extend the elbow joint
Correct Answer: C) Pain at the elbow with resisted movements at the wrist and forearm
Rationale: Lateral epicondylitis involves the common extensor tendon, particularly the
extensor carpi radialis brevis. Pain is localized to the lateral epicondyle and is exacerbated
by maneuvers that put stress on these tendons, such as resisted wrist extension or
, 3
supination. Pain with resisted wrist flexion would instead point toward medial epicondylitis
(Golfer's elbow).
Question 5
When performing a musculoskeletal examination on a patient with a localized injury, what is the
standard protocol for assessing range of motion and strength?
A) Examine the involved side first to establish a baseline of pain.
B) The uninvolved side should be examined initially and then compared to the involved side.
C) Only examine the involved side to save time.
D) Examine the joints above and below but skip the injured site.
E) Ask the patient to perform heavy lifting to test maximum strength.
Correct Answer: B) The uninvolved side should be examined initially and then compared to
the involved side.
Rationale: Examining the healthy side first allows the clinician to determine the patient's
normal "baseline" for range of motion and strength. This provides a clear point of
comparison for the injured side and helps build the patient's trust before moving to the
painful area. It also helps in identifying subtle deficits that might otherwise be missed.
Question 6
Which of the following clinical indicators is most suggestive of an inflammatory, rather than
mechanical, etiology for musculoskeletal pain?
A) Pain that worsens with activity
B) Localized tenderness without swelling
C) Morning stiffness lasting more than 30–60 minutes
D) Relief of pain with cold compresses
E) Crepitus upon movement of the joint
Correct Answer: C) Morning stiffness
Rationale: Morning stiffness is a classic hallmark of inflammatory conditions like
Rheumatoid Arthritis. In inflammatory diseases, joint stiffness is usually prolonged (often
over an hour) and improves as the patient moves. In mechanical conditions like
, 4
Osteoarthritis, stiffness is usually brief (less than 30 minutes) and the pain typically
worsens with increased activity throughout the day.
Question 7
Statistically, which animal is responsible for the greatest percentage of mammalian bite injuries
reported in the United States?
A) Cats
B) Bats
C) Raccoons
) Humans
E) Dogs
Correct Answer: E) Dogs
Rationale: Dog bites account for approximately 80% to 90% of all mammalian bites
reported to emergency departments. While cat bites carry a higher risk of infection due to
the "puncture" nature of the wound and the prevalence of Pasteurella multocida, dog bites
are more frequent and often cause more significant crush and tissue damage.
Question 8
A 48-year-old woman presents with heavy menstrual periods (menorrhagia) and paleness. A
pelvic exam reveals a single large midline mass. Which diagnostic test is the priority?
A) Abdominal CT scan
B) Endometrial biopsy
C) Transvaginal ultrasound
D) Serum HCG level
E) Hysterosalpingogram
Correct Answer: C) Transvaginal ultrasound
Rationale: Transvaginal ultrasound is the imaging modality of choice for evaluating the
uterus and ovaries. In this case, the clinician is looking for leiomyomas (uterine fibroids),
which are the most common cause of a large, firm, midline uterine mass and heavy
bleeding in women of this age group. Ultrasound is non-invasive, cost-effective, and highly
accurate for sizing and locating fibroids.
