EGANS TEST BANK QUESTIONS AND WELL ANALYSIED, VERIFIED AND EXPLAINED ANSWERS ||
LATEST DOWNLOAD INSTA AFTER PURCHASING THE DOCUMENT IN PDF FORM [FROM CHAPTER 8]
Chapter 08: The Respiratory System
MULTIPLE CHOICE
1. By what mechanism does gas exchange across the lung occur?
a. active transport
b. facilitated diffusion
c. facilitated transport
d. simple diffusion
ANS: D
This close “match” of gas and blood across a large but extremely thin blood-gas barrier
membrane enables efficient gas exchange to occur by simple diffusion.
DIF: Application REF: p. 148 OBJ: 1
2. What is the primary purpose of the respiratory system?
a. continuous absorption of oxygen and excretion of carbon dioxide
b. filtering to prevent allergens and microbes from reaching the lungs
c. transport oxygenated blood to the tissues
d. warm and humidify inspired gas
ANS: A
The respiratory system's primary function is the continuous absorption of oxygen and the
excretion of carbon dioxide.
DIF: Application REF: p. 148 OBJ: 1
3. What is meant by “internal respiration”?
, a. any gas exchange that occurs inside the body
b. consumption of oxygen in the mitochondria
c. continuous absorption of oxygen and excretion of carbon dioxide
d. exchange of gases between the blood and the tissue
ANS: D
This process supports internal respiration, which is the exchange of gases between blood and
tissues.
DIF: Application REF: p. 148 OBJ: 1
4. Developmental morphogenesis of the human respiratory system can be categorized into:
a. three periods
b. five stages
c. 6 weeks
d. 40 weeks
, ANS: B
Figure 8-1 shows the various stages of lung development, and Table 8-1 summarizes the
major developmental events in each phase.
DIF: Application REF: p. 149 OBJ: 1
5. The human genome contains pairs of chromosomes.
a. 16
b. 23
c. 46
d. 50
ANS: B
DNA is organized into 23 pairs of supercoiled masses that are called chromosomes.
DIF: Recall REF: p. 150 OBJ: 2
6. Which chromosome has been found to carry the defective gene responsible for the
development of cystic fibrosis?
a. 1
b. 7
c. 15
d. 23
ANS: B
The defective gene that is responsible for defective CFTR is located on chromosome 7 in the
q31.2 region and has been found to be mutable in more than 1500 different ways.
DIF: Recall REF: p. 191 OBJ: 2
7. The fetus is potentially viable if born prematurely after how many weeks of gestation?
a. 12 to 16 weeks
b. 18 to 20 weeks
c. 24 to 26 weeks
d. 28 to 32 weeks
ANS: C
, At the end of the canalicular period (24 to 26 weeks of gestation), the fetus, if born, is
capable of sufficient gas exchange and is viable if supported completely with an artificial
airway, oxygen, ventilatory support, and surfactant administration.
DIF: Application REF: p. 149 OBJ: 1
8. The fetus is potentially viable if born at the end of which stage of development?
a. alveolar
b. canalicular
c. pseudoglandular
d. saccular
ANS: B
At the end of the canalicular period (24 to 26 weeks of gestation), the fetus, if born, is
capable of sufficient gas exchange and is viable if supported completely with an artificial
airway, oxygen, ventilatory support, and surfactant administration.
DIF: Application REF: p. 149 OBJ: 1
9. During which phase of fetal development do mature alveoli appear?
a. alveolar
b. canalicular
c. pseudoglandular
d. saccular
ANS: A
The development of mature alveoli, accompanied by capillary proliferation within the walls,
marks the final phase of lung development and is known as the alveolar period.
DIF: Application REF: p. 149 OBJ: 1
10. Which of the following is an index commonly used to determine relative lung maturity?
a. FRC/TLC ratio
b. L:S ratio
c. RQ ratio
d. SP-A
ANS: B
Quantification of these phospholipids (the L:S ratio and PG concentration) provides a
predictive index of the lung maturity in the fetus before birth and the risks of developing
respiratory disease.
DIF: Application REF: p. 153 OBJ: 1
LATEST DOWNLOAD INSTA AFTER PURCHASING THE DOCUMENT IN PDF FORM [FROM CHAPTER 8]
Chapter 08: The Respiratory System
MULTIPLE CHOICE
1. By what mechanism does gas exchange across the lung occur?
a. active transport
b. facilitated diffusion
c. facilitated transport
d. simple diffusion
ANS: D
This close “match” of gas and blood across a large but extremely thin blood-gas barrier
membrane enables efficient gas exchange to occur by simple diffusion.
DIF: Application REF: p. 148 OBJ: 1
2. What is the primary purpose of the respiratory system?
a. continuous absorption of oxygen and excretion of carbon dioxide
b. filtering to prevent allergens and microbes from reaching the lungs
c. transport oxygenated blood to the tissues
d. warm and humidify inspired gas
ANS: A
The respiratory system's primary function is the continuous absorption of oxygen and the
excretion of carbon dioxide.
DIF: Application REF: p. 148 OBJ: 1
3. What is meant by “internal respiration”?
, a. any gas exchange that occurs inside the body
b. consumption of oxygen in the mitochondria
c. continuous absorption of oxygen and excretion of carbon dioxide
d. exchange of gases between the blood and the tissue
ANS: D
This process supports internal respiration, which is the exchange of gases between blood and
tissues.
DIF: Application REF: p. 148 OBJ: 1
4. Developmental morphogenesis of the human respiratory system can be categorized into:
a. three periods
b. five stages
c. 6 weeks
d. 40 weeks
, ANS: B
Figure 8-1 shows the various stages of lung development, and Table 8-1 summarizes the
major developmental events in each phase.
DIF: Application REF: p. 149 OBJ: 1
5. The human genome contains pairs of chromosomes.
a. 16
b. 23
c. 46
d. 50
ANS: B
DNA is organized into 23 pairs of supercoiled masses that are called chromosomes.
DIF: Recall REF: p. 150 OBJ: 2
6. Which chromosome has been found to carry the defective gene responsible for the
development of cystic fibrosis?
a. 1
b. 7
c. 15
d. 23
ANS: B
The defective gene that is responsible for defective CFTR is located on chromosome 7 in the
q31.2 region and has been found to be mutable in more than 1500 different ways.
DIF: Recall REF: p. 191 OBJ: 2
7. The fetus is potentially viable if born prematurely after how many weeks of gestation?
a. 12 to 16 weeks
b. 18 to 20 weeks
c. 24 to 26 weeks
d. 28 to 32 weeks
ANS: C
, At the end of the canalicular period (24 to 26 weeks of gestation), the fetus, if born, is
capable of sufficient gas exchange and is viable if supported completely with an artificial
airway, oxygen, ventilatory support, and surfactant administration.
DIF: Application REF: p. 149 OBJ: 1
8. The fetus is potentially viable if born at the end of which stage of development?
a. alveolar
b. canalicular
c. pseudoglandular
d. saccular
ANS: B
At the end of the canalicular period (24 to 26 weeks of gestation), the fetus, if born, is
capable of sufficient gas exchange and is viable if supported completely with an artificial
airway, oxygen, ventilatory support, and surfactant administration.
DIF: Application REF: p. 149 OBJ: 1
9. During which phase of fetal development do mature alveoli appear?
a. alveolar
b. canalicular
c. pseudoglandular
d. saccular
ANS: A
The development of mature alveoli, accompanied by capillary proliferation within the walls,
marks the final phase of lung development and is known as the alveolar period.
DIF: Application REF: p. 149 OBJ: 1
10. Which of the following is an index commonly used to determine relative lung maturity?
a. FRC/TLC ratio
b. L:S ratio
c. RQ ratio
d. SP-A
ANS: B
Quantification of these phospholipids (the L:S ratio and PG concentration) provides a
predictive index of the lung maturity in the fetus before birth and the risks of developing
respiratory disease.
DIF: Application REF: p. 153 OBJ: 1
