Question Type: Multiple Choice
1) The upper respiratory tract consists of the:
a) pharynx
b) nasal cavity
c) primary bronchi
d) two of these choices
Answer: d
Difficulty: Easy
Learning Objective 1: LO 21.1 Review the anatomy of the upper and lower respiratory tract as it pertains to microbial defenses.
Section Reference 1: Section 21.1 Components of the Respiratory System
2) Middle ear infections are common in children because _____.
a) they do not secrete cerumen
b) their tympanic membranes are thinner than in adults
c) their Eustachian tubes are shorter and wider
d) two of these choices
Answer: c
Difficulty: Medium
Learning Objective 1: LO 21.1 Review the anatomy of the upper and lower respiratory tract as it pertains to microbial defenses.
Section Reference 1: Section 21.1 Components of the Respiratory System
3) If pathogens evade the non-defenses of the upper respiratory tract and enter the alveoli, _______ can protect the body from infection.
a) histiocytes
b) macrophages
c) NK cells
d) Goblet cells
Answer: b
Difficulty: Medium
Learning Objective 1: LO 21.1 Review the anatomy of the upper and lower respiratory tract as it pertains to microbial defenses.
Section Reference 1: Section 21.1 Components of the Respiratory System
4) Which of the following can evade the killing power of macrophages and replicate in them?
a) Mycobacterium
b) Streptococcus
c) Coccidioides immitis
d) two of these choices
Answer: d
Difficulty: Medium
Learning Objective 1: LO 21.1 Review the anatomy of the upper and lower respiratory tract as it pertains to microbial defenses.
Section Reference 1: Section 21.1 Components of the Respiratory System
5) Which of the following statements about normal microflora of the respiratory system is incorrect?
a) The presence of Haemophilus in the pharynx does not indicate disease.
b) About 1/3 of the population carries Staphylococcus aureus in their nasal cavity.
c)