Respiratory-system Test bank
Physiology (9 lectures), anatomy (6 lectures), Microbiology (6 lectures)
Embryology (2 lectures) histology (2 lectures) Pathology (4 lectures)
Sources of questions: Past papers, Book questions, USMLE step 1 style questions.
, Physiology-past papers
1. All the following laboratory values are consistent with pulmonary fibrosis
EXCEPT?
a. Increased residual volume
b. Increased vascular resistance
c. Normal or above normal FEV1/FVC
d. Decreased lung compliance
, e. Normal or above normal peak expiratory flow (corrected for lung volume)
Answer: A
2. Which of the following is NOT true at FRC?
a. It is about 75% TLC.
b. The elastic recoil of the chest wall is outward.
c. The elastic recoil of the lung is inward.
d. The lung-thorax system is at rest.
e. pulmonary vascular resistance is the lowest
Answer: B
3. Regarding dead space, choose the FALSE statement
a. is defined as the volume of gas which does not take part in gas exchange
b. physiological dead space is the same as alveolar dead space
c. physiological dead space is measured by measuring mixed expiratory PCO2
d. mechanical ventilation (respirator) increases dead space volume.
e. increases whenever V/Q ratio is increased
Answer: C
4. Regarding pulmonary vascular resistance, which one of the following is true?
نیافالؤھعدقلسبت
a. is low at high lung volumes
b. is low at low lung volumes
c. if increased, can cause right heart failure
d. is measured through routine pulmonary function tests
e. is more than systemic vascular resistance.
Answer: B
5. Which of the following is NOT true concerning respiratory distress syndrome in
premature infants?
, a. Their ability to synthesize surfactant is limited.
b. Higher pressures are required to ventilate the lungs.
c. Lung compliance is low.
d. Positive pressure respirators are often used to assist them in breathing.
e. Alveoli tend to overexpand and sometimes burst at the end of inspiration
Answer: E
6. Which of the following structures contains blood with the highest PCO2? a.
Carotid bodies.
b. Pulmonary veins
c. Superior vena cava
d. The midportion of pulmonary capillaries.
e. Systemic arterioles
Answer: C
7. What is expected in a premature baby with IRDS? T=alveolar surface tension, C=lung
compliance, Pa02=arterial PO2?
a. T: Increase, C: increase, Pa02: increase
b. T: Increase, C: decrease, PaO2: decrease
c. T: Decrease, C: decrease, Pa02: equal
d. T: Increase, C: increase, PaO2: decrease
e. T: Increase, C: increase, PaO2: decrease
Answer: B
8. In an asthmatic attack,which of the following is expected ?
a. Wheezing sounds are heard during inspiration more than that during expiration.
b. Bronchodilators are contraindicated.
c. Work of breathing is increased.
d. FEV1 is expected to increase.
e. Every asthmatic patients is a member of the COPD family.
Answer: C
9. In the presence of active surfactants, all of the following are expected to decrease
EXCEPT?
Physiology (9 lectures), anatomy (6 lectures), Microbiology (6 lectures)
Embryology (2 lectures) histology (2 lectures) Pathology (4 lectures)
Sources of questions: Past papers, Book questions, USMLE step 1 style questions.
, Physiology-past papers
1. All the following laboratory values are consistent with pulmonary fibrosis
EXCEPT?
a. Increased residual volume
b. Increased vascular resistance
c. Normal or above normal FEV1/FVC
d. Decreased lung compliance
, e. Normal or above normal peak expiratory flow (corrected for lung volume)
Answer: A
2. Which of the following is NOT true at FRC?
a. It is about 75% TLC.
b. The elastic recoil of the chest wall is outward.
c. The elastic recoil of the lung is inward.
d. The lung-thorax system is at rest.
e. pulmonary vascular resistance is the lowest
Answer: B
3. Regarding dead space, choose the FALSE statement
a. is defined as the volume of gas which does not take part in gas exchange
b. physiological dead space is the same as alveolar dead space
c. physiological dead space is measured by measuring mixed expiratory PCO2
d. mechanical ventilation (respirator) increases dead space volume.
e. increases whenever V/Q ratio is increased
Answer: C
4. Regarding pulmonary vascular resistance, which one of the following is true?
نیافالؤھعدقلسبت
a. is low at high lung volumes
b. is low at low lung volumes
c. if increased, can cause right heart failure
d. is measured through routine pulmonary function tests
e. is more than systemic vascular resistance.
Answer: B
5. Which of the following is NOT true concerning respiratory distress syndrome in
premature infants?
, a. Their ability to synthesize surfactant is limited.
b. Higher pressures are required to ventilate the lungs.
c. Lung compliance is low.
d. Positive pressure respirators are often used to assist them in breathing.
e. Alveoli tend to overexpand and sometimes burst at the end of inspiration
Answer: E
6. Which of the following structures contains blood with the highest PCO2? a.
Carotid bodies.
b. Pulmonary veins
c. Superior vena cava
d. The midportion of pulmonary capillaries.
e. Systemic arterioles
Answer: C
7. What is expected in a premature baby with IRDS? T=alveolar surface tension, C=lung
compliance, Pa02=arterial PO2?
a. T: Increase, C: increase, Pa02: increase
b. T: Increase, C: decrease, PaO2: decrease
c. T: Decrease, C: decrease, Pa02: equal
d. T: Increase, C: increase, PaO2: decrease
e. T: Increase, C: increase, PaO2: decrease
Answer: B
8. In an asthmatic attack,which of the following is expected ?
a. Wheezing sounds are heard during inspiration more than that during expiration.
b. Bronchodilators are contraindicated.
c. Work of breathing is increased.
d. FEV1 is expected to increase.
e. Every asthmatic patients is a member of the COPD family.
Answer: C
9. In the presence of active surfactants, all of the following are expected to decrease
EXCEPT?
