1. Which of the following is the function of the respiratory system?
a. absorption of nutrients
c. gas exchange
b. transport of oxygen
d. skeletal support

2. Which of the following statements describes the function of the diaphragm?
a.It contracts and relaxes during respiration to change the volume of the chest cavity
b. It serves as the passage of air into the lungs
c.It carries blood throughout the body
d.It is the site of gas exchange
3. The lungs bring
into the body, and eliminates from the body.
a. carbon monoxide, oxygen
C. carbon monoxide , carbon dioxide
oxygen, carbon dioxide
d. oxygen , carbon monoxide
4. Which of the following structures is NOT part of the respiratory system?
a. Alveoli b. Bronchus
c. Heart d. Trachea
5. A baby swallows her food and accidentally, it does not enter the esophagus. What
structure does not function properly and diverted the food into the respiratory tractinstead of the
esophagus?
a. trachea b. epiglottis c. larynx d. bronchus
6.Which of the following statements is NOT part of exhalation?
a. The ribcage contracts inward
b. The volume of the chest cavity decreases
C. The diaphragm contracts and pulls downward
d. The pressure within the chest cavity increases
7.At what structures in the lungs do the exchange of oxygen and carbondioxide
a. Bronchi b. Alveoli c. Bronchiolesd. Trachea
take place?
8. What happens to the pressure in your chest cavity when you inhale?
a. Air pressure remains the same c. Air pressure is increased
b. Air pressure is reduced
d. Air pressure changes​