NUR 3490 EXAM 1 | QUESTIONS AND ANSWERS | 2026 UPDATE | WITH COMPLETE
SOLUTIONS - MOLLOY COLLEGE.
Question 1
Which of the following structures comprise the upper respiratory tract in a pediatric patient?
A) Bronchi and Alveoli
B) Nose and Pharynx
C) Bronchioles and Trachea
D) Lungs and Diaphragm
E) Epiglottis and Bronchi
Correct Answer: B) Nose and Pharynx
Rationale: The respiratory system is anatomically divided into the upper and lower tracts.
The upper tract consists primarily of the nose, nasopharynx, oropharynx, and
laryngopharynx. The lower tract begins below the larynx and includes the trachea,
bronchi, and bronchioles.
Question 2
What structures are included in the lower respiratory tract?
A) Nose and Sinuses
B) Pharynx and Larynx
C) Bronchi and Bronchioles
D) Epiglottis and Trachea
E) Tonsils and Adenoids
Correct Answer: C) Bronchi and Bronchioles
Rationale: The lower respiratory tract consists of the structures below the larynx,
specifically the bronchi, bronchioles, and the alveoli where gas exchange occurs. These
structures are more prone to serious infections like pneumonia and bronchiolitis.
Question 3
Which condition is characterized as an infection of the epiglottis or larynx, often resulting in a
"barking" cough?
A) Nasopharyngitis
B) Bronchiolitis
C) Croup syndromes
D) Tonsillitis
E) Otitis Media
Correct Answer: C) Croup syndromes
Rationale: Croup syndromes refer to a group of conditions characterized by swelling and
inflammation of the upper airway, specifically the larynx and epiglottis. The classic
presentation includes inspiratory stridor and a seal-like barking cough.
Question 4
Which infectious agent is recognized as the most common viral cause of pediatric respiratory
, 2
infections, particularly bronchiolitis?
A) Group A β-hemolytic streptococcus
B) Staphylococcus aureus
C) Respiratory syncytial virus (RSV)
D) Chlamydia trachomatis
E) Haemophilus influenzae
Correct Answer: C) Respiratory syncytial virus (RSV)
Rationale: RSV is the most frequent cause of lower respiratory tract infections in infants
and young children. It is highly contagious and follows a seasonal pattern, typically
peaking in winter and early spring.
Question 5
At what age are maternal antibodies, typically obtained via breastfeeding and placental transfer,
most effective at protecting an infant from infection?
A) Birth to 1 month
B) Less than 3 months
C) 6 to 12 months
D) 1 to 3 years
E) Greater than 5 years
Correct Answer: B) Less than 3 months
Rationale: Infants under 3 months of age are generally protected by passive immunity
provided by maternal IgG antibodies. After 3 months, these antibody levels decrease,
leading to an increase in the infection rate as the infant's own immune system begins to
develop.
Question 6
Between the ages of 3 and 6 months, why does the rate of pediatric infection typically increase?
A) The child begins attending daycare
B) Maternal antibody levels transition to the infant's developing immunity
C) The child begins to crawl and touch surfaces
D) The diameter of the airway increases
E) All children receive their first round of vaccines at this time
Correct Answer: B) Maternal antibody levels transition to the infant's developing immunity
Rationale: As maternal antibodies (passive immunity) wane and the infant's active
immunity is still immature, there is a period of increased vulnerability to pathogens,
resulting in a spike in respiratory infections during this window.
Question 7
Which pediatric age group is associated with the highest rate of viral infections?
A) Neonates (<28 days)
B) Toddlers and preschoolers
, 3
C) School-age children
D) Adolescents
E) Infants <3 months
Correct Answer: B) Toddlers and preschoolers
Rationale: Toddlers and preschoolers have a high rate of viral infections due to increased
social exposure (such as daycare and playgroups) and their tendency to put objects in their
mouths, combined with an immune system that is still gaining experience with common
viruses.
Question 8
Children older than 5 years of age show an increased incidence of infections caused by which
specific pathogens?
A) Respiratory syncytial virus (RSV)
B) Mycoplasma pneumonia and β-strep
C) Chlamydia trachomatis
D) Parainfluenza virus
E) Rotavirus
Correct Answer: B) Mycoplasma pneumonia and β-strep
Rationale: As children enter school age (>5 years), the epidemiology of respiratory
infections shifts. They are more likely to encounter Mycoplasma pneumonia (walking
pneumonia) and Group A beta-hemolytic streptococcal infections (strep throat) due to close
proximity in classrooms.
Question 9
What is the general relationship between age and pediatric immunity?
A) Immunity is highest at birth and decreases with age
B) Immunity remains static until puberty
C) Immunity generally increases with age as the child is exposed to more pathogens
D) Immunity is not affected by age
E) Immunity only increases if the child is formula-fed
Correct Answer: C) Immunity generally increases with age as the child is exposed to more
pathogens
Rationale: As children grow, they develop "immunological memory" from previous
exposures and vaccinations. Consequently, while they get sick often as toddlers, the
frequency and severity of common infections usually decrease as they move into later
childhood.
Question 10
Which anatomical difference in a pediatric patient contributes to a higher risk of rapid infection
spread compared to adults?
A) Shorter distance between structures and short eustachian tubes
SOLUTIONS - MOLLOY COLLEGE.
Question 1
Which of the following structures comprise the upper respiratory tract in a pediatric patient?
A) Bronchi and Alveoli
B) Nose and Pharynx
C) Bronchioles and Trachea
D) Lungs and Diaphragm
E) Epiglottis and Bronchi
Correct Answer: B) Nose and Pharynx
Rationale: The respiratory system is anatomically divided into the upper and lower tracts.
The upper tract consists primarily of the nose, nasopharynx, oropharynx, and
laryngopharynx. The lower tract begins below the larynx and includes the trachea,
bronchi, and bronchioles.
Question 2
What structures are included in the lower respiratory tract?
A) Nose and Sinuses
B) Pharynx and Larynx
C) Bronchi and Bronchioles
D) Epiglottis and Trachea
E) Tonsils and Adenoids
Correct Answer: C) Bronchi and Bronchioles
Rationale: The lower respiratory tract consists of the structures below the larynx,
specifically the bronchi, bronchioles, and the alveoli where gas exchange occurs. These
structures are more prone to serious infections like pneumonia and bronchiolitis.
Question 3
Which condition is characterized as an infection of the epiglottis or larynx, often resulting in a
"barking" cough?
A) Nasopharyngitis
B) Bronchiolitis
C) Croup syndromes
D) Tonsillitis
E) Otitis Media
Correct Answer: C) Croup syndromes
Rationale: Croup syndromes refer to a group of conditions characterized by swelling and
inflammation of the upper airway, specifically the larynx and epiglottis. The classic
presentation includes inspiratory stridor and a seal-like barking cough.
Question 4
Which infectious agent is recognized as the most common viral cause of pediatric respiratory
, 2
infections, particularly bronchiolitis?
A) Group A β-hemolytic streptococcus
B) Staphylococcus aureus
C) Respiratory syncytial virus (RSV)
D) Chlamydia trachomatis
E) Haemophilus influenzae
Correct Answer: C) Respiratory syncytial virus (RSV)
Rationale: RSV is the most frequent cause of lower respiratory tract infections in infants
and young children. It is highly contagious and follows a seasonal pattern, typically
peaking in winter and early spring.
Question 5
At what age are maternal antibodies, typically obtained via breastfeeding and placental transfer,
most effective at protecting an infant from infection?
A) Birth to 1 month
B) Less than 3 months
C) 6 to 12 months
D) 1 to 3 years
E) Greater than 5 years
Correct Answer: B) Less than 3 months
Rationale: Infants under 3 months of age are generally protected by passive immunity
provided by maternal IgG antibodies. After 3 months, these antibody levels decrease,
leading to an increase in the infection rate as the infant's own immune system begins to
develop.
Question 6
Between the ages of 3 and 6 months, why does the rate of pediatric infection typically increase?
A) The child begins attending daycare
B) Maternal antibody levels transition to the infant's developing immunity
C) The child begins to crawl and touch surfaces
D) The diameter of the airway increases
E) All children receive their first round of vaccines at this time
Correct Answer: B) Maternal antibody levels transition to the infant's developing immunity
Rationale: As maternal antibodies (passive immunity) wane and the infant's active
immunity is still immature, there is a period of increased vulnerability to pathogens,
resulting in a spike in respiratory infections during this window.
Question 7
Which pediatric age group is associated with the highest rate of viral infections?
A) Neonates (<28 days)
B) Toddlers and preschoolers
, 3
C) School-age children
D) Adolescents
E) Infants <3 months
Correct Answer: B) Toddlers and preschoolers
Rationale: Toddlers and preschoolers have a high rate of viral infections due to increased
social exposure (such as daycare and playgroups) and their tendency to put objects in their
mouths, combined with an immune system that is still gaining experience with common
viruses.
Question 8
Children older than 5 years of age show an increased incidence of infections caused by which
specific pathogens?
A) Respiratory syncytial virus (RSV)
B) Mycoplasma pneumonia and β-strep
C) Chlamydia trachomatis
D) Parainfluenza virus
E) Rotavirus
Correct Answer: B) Mycoplasma pneumonia and β-strep
Rationale: As children enter school age (>5 years), the epidemiology of respiratory
infections shifts. They are more likely to encounter Mycoplasma pneumonia (walking
pneumonia) and Group A beta-hemolytic streptococcal infections (strep throat) due to close
proximity in classrooms.
Question 9
What is the general relationship between age and pediatric immunity?
A) Immunity is highest at birth and decreases with age
B) Immunity remains static until puberty
C) Immunity generally increases with age as the child is exposed to more pathogens
D) Immunity is not affected by age
E) Immunity only increases if the child is formula-fed
Correct Answer: C) Immunity generally increases with age as the child is exposed to more
pathogens
Rationale: As children grow, they develop "immunological memory" from previous
exposures and vaccinations. Consequently, while they get sick often as toddlers, the
frequency and severity of common infections usually decrease as they move into later
childhood.
Question 10
Which anatomical difference in a pediatric patient contributes to a higher risk of rapid infection
spread compared to adults?
A) Shorter distance between structures and short eustachian tubes
