1. Ventilation include A. inspiration only B. expiration only c. both inspiration and expiration d. the...
1. Ventilation include
A. inspiration only
B. expiration only
c. both inspiration and expiration
d. the volume of air that can be exhaled
2. What part of the respiratory system carries out gas exchange?
a. larynx
b. nasal cavity
c. lungs
d. diaphragm
3. Which of the following is NOT part of the inspiration?
a. the pressure in the lung increases
b. the rib cage moves up and out
c. the intercostal muscles pull the ribs outwards
d. the diaphragm contracts and moves down
e. Air rushes into the lungs
4. Which of the following is NOT a function of the conducting zone/pathways?
a. filtering and cleaning the air
b. gas exchange
c. warming the air
d. humidifying the air
4. Ventilation would be decreased/be harder if we decreased the activity of
a. type l alveolar cells.
b. type ll alveolar cell
c. red blood cell
d. white blood cells
e. None of these are correct
5. Quiet expiration is caused by
a. contraction of the external intercostal muscles
b. ontraction of the intercostal muscles
c. lung recoil (return to original size) and increased intrapulmonary pressure
d. relaxation of the internal intercostal muscles
e. contraction of the diaphragm
6. Which of the following is true?
a. blood in the blood vessels going from the lungs to the heart is low in oxygen
b. he oxygen concentration of inspired air is higher than that of air inside the lungs
d. blood in the blood vessels going from the lungs to the heart is high in carob dioxide
e. all of the choices are true
Homework Answers
Answer:
1) c. both inspiration and expiration
Explanation: Ventilation is the process of taking the air inside and giving the air out of the lung.
2) c. lungs
Explanation: Lung contains the alveoli where gaseous exchange occurs
3) b. gas exchange
Explanation: Conducting zones only conduct the air but gaseous exchange does not occur
4) b. type ll alveolar cell
Explanation: Type II alveolar cells secrete surfactant that reduces the surface tension in the alveoli and makes the alveoli more patent.
5) c. lung recoil (return to original size) and increased intrapulmonary pressure
Explanation: Quiet expiration occurs passively without the aid of respiratory muscles.
6) b. the oxygen concentration of inspired air is higher than that of air inside the lung
Add Answer to:
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