EXERCISES, LESSON 1
REQUIREMENT: The following exercises are to be answered by marking the lettered
response that best answers the question; or by completing the incomplete statement; or
by writing the answer in the space provided at the end of the question.
After you have completed all the exercises, turn to "Solutions to Exercises", at the end
of the lesson, and check your answers with the solutions.
External respiration is ___________________.
a. The exchange of gases between the atmosphere and the cells of the
b. The exchange of gases between the blood and the individual cells of the
The exchange of gases between the air in the lungs and blood.
The aeration of the lungs.
Bronchi are ____________________________.
a. Tubes that lead from the larynx to the lungs.
b. Tubes that warm and humidify the air as it enters the lungs.
c. Tubes that extend into the nasal chamber in order to increase the surface
area exposed to inflowing air.
d. Tubes that lead from the trachea to the lungs.
Select the statement that best describes the paranasal sinuses.
a. Air cells or cavities in the skull that are connected with the nasal chambers
and lined with ciliated mucoperiosteum.
b. Special nerve endings located in the upper areas of the nasal chambers.
c. The portion of the pharynx that is common to both the respiratory and
d. The vestibules that are covered by the epiglottis.