PHGY MOD 9 MC EXAM QUESTIONS AND
COMPLETE ANSWERS
Which of the following are the muscles involved in inspiration? - ANSWER External
intercostals, diaphragm
With regard to the elastic recoil of the lungs, which of the following statements is correct? -
ANSWER Surface tension plays the major role
At the beginning of inspiration, which of the following pressure relationships is correct? -
ANSWER Alveolar pressure equals atmospheric pressure
With regard to respiratory physiology, when is compliance greatest? - ANSWER At functional
residual capacity
With regard to respiratory physiology, when lung compliance decreases, which of the
following is correct? - ANSWER The amount of work to breath increases
A long-term inflammatory disease of the airways characterized by variable/recurring
symptoms is: - ANSWER Asthma
The volume of air entering or leaving the lungs during a normal breath is: - ANSWER Tidal
volume
, Which of the following is the most effective way to increase alveolar ventilation? - ANSWER
Slower respiratory rate, higher tidal volume
The category of hypoxia that is characterized by normal arterial PO2 but low oxygen content
is called? - ANSWER Circulating hypoxia
Which one of the following is the primary determinant for the chemical control of breathing?
- ANSWER H+
Why do smaller alveoli not collapse despite smaller radius? - ANSWER Increased surfactant
secretion
The pressure in the alveoli. 0 cmH2O - ANSWER PA
The pressure exerted by the atmosphere. 0 cmH2O - ANSWER PB
Pressure in the pleural space, approx -5 cmH2O - ANSWER Ppl
Difference between the alveolar pressure and the pleural pressure. AKA lung recoil pressure
(Pi) - ANSWER Ptp
COMPLETE ANSWERS
Which of the following are the muscles involved in inspiration? - ANSWER External
intercostals, diaphragm
With regard to the elastic recoil of the lungs, which of the following statements is correct? -
ANSWER Surface tension plays the major role
At the beginning of inspiration, which of the following pressure relationships is correct? -
ANSWER Alveolar pressure equals atmospheric pressure
With regard to respiratory physiology, when is compliance greatest? - ANSWER At functional
residual capacity
With regard to respiratory physiology, when lung compliance decreases, which of the
following is correct? - ANSWER The amount of work to breath increases
A long-term inflammatory disease of the airways characterized by variable/recurring
symptoms is: - ANSWER Asthma
The volume of air entering or leaving the lungs during a normal breath is: - ANSWER Tidal
volume
, Which of the following is the most effective way to increase alveolar ventilation? - ANSWER
Slower respiratory rate, higher tidal volume
The category of hypoxia that is characterized by normal arterial PO2 but low oxygen content
is called? - ANSWER Circulating hypoxia
Which one of the following is the primary determinant for the chemical control of breathing?
- ANSWER H+
Why do smaller alveoli not collapse despite smaller radius? - ANSWER Increased surfactant
secretion
The pressure in the alveoli. 0 cmH2O - ANSWER PA
The pressure exerted by the atmosphere. 0 cmH2O - ANSWER PB
Pressure in the pleural space, approx -5 cmH2O - ANSWER Ppl
Difference between the alveolar pressure and the pleural pressure. AKA lung recoil pressure
(Pi) - ANSWER Ptp
