WILEYPLUS CHAPTER 23 RESPIRATORY QUESTIONS AND
ANSWERS | RESPIRATORY STUDY GUIDE & PRACTICE TEST
2026/2027
The respiratory and cardiovascular systems have all of the following functions in common EXCEPT
1. transport of gases.
2. exchange of gases
3. maintenance of blood pH - ANS ✔✔1, 2 , and 3 are functions of both systems
As the bronchial tree branches from bronchi to bronchioles, cartilage decreases while smooth muscle
increases. - ANS ✔✔True
A mechanical ventilator may aid directly in - ANS ✔✔pulmonary ventilation
In external respiration __________, while __________ occurs in internal respiration. - ANS ✔✔oxygen
moves from the alveoli to the pulmonary capillaries; carbon dioxide moves from the tissues to the
systemic capillaries.
hemoglobin will bind more oxygen when the partial pressure is low than when the partial pressure is
high. - ANS ✔✔False
In the medullary rhythmicity area, the dorsal respiratory group (inspiratory area) establishes the basic
rhythm of quiet breathing while the ventral respiratory group (expiratory area) remains inactive. - ANS
✔✔True
The respiratory zone does NOT include any structures of the upper respiratory system. - ANS ✔✔True
The internal structures of the external nose serve which of the following functions?
1. warming, moistening, and filtering incoming air
2. creating resonance
3. increasing gas exchange - ANS ✔✔1 & 2
Surfactant lowers the surface tension of alveolar fluid; it is produced by - ANS ✔✔type II alveolar cells
Carbon dioxide is transported in the blood
1. as dissolved carbon dioxide.
2. as bicarbonate ions.
3. bound to heme. - ANS ✔✔1 & 2
After holding our breath briefly, what eventually forces us to take a breath? - ANS ✔✔increasing carbon
dioxide levels
Which is the correct sequence of events for inhalation?
1. pressure of the atmosphere is greater than the pressure within the thorax
2. volume of the thorax increases and the pressure within the thorax decreases
ANSWERS | RESPIRATORY STUDY GUIDE & PRACTICE TEST
2026/2027
The respiratory and cardiovascular systems have all of the following functions in common EXCEPT
1. transport of gases.
2. exchange of gases
3. maintenance of blood pH - ANS ✔✔1, 2 , and 3 are functions of both systems
As the bronchial tree branches from bronchi to bronchioles, cartilage decreases while smooth muscle
increases. - ANS ✔✔True
A mechanical ventilator may aid directly in - ANS ✔✔pulmonary ventilation
In external respiration __________, while __________ occurs in internal respiration. - ANS ✔✔oxygen
moves from the alveoli to the pulmonary capillaries; carbon dioxide moves from the tissues to the
systemic capillaries.
hemoglobin will bind more oxygen when the partial pressure is low than when the partial pressure is
high. - ANS ✔✔False
In the medullary rhythmicity area, the dorsal respiratory group (inspiratory area) establishes the basic
rhythm of quiet breathing while the ventral respiratory group (expiratory area) remains inactive. - ANS
✔✔True
The respiratory zone does NOT include any structures of the upper respiratory system. - ANS ✔✔True
The internal structures of the external nose serve which of the following functions?
1. warming, moistening, and filtering incoming air
2. creating resonance
3. increasing gas exchange - ANS ✔✔1 & 2
Surfactant lowers the surface tension of alveolar fluid; it is produced by - ANS ✔✔type II alveolar cells
Carbon dioxide is transported in the blood
1. as dissolved carbon dioxide.
2. as bicarbonate ions.
3. bound to heme. - ANS ✔✔1 & 2
After holding our breath briefly, what eventually forces us to take a breath? - ANS ✔✔increasing carbon
dioxide levels
Which is the correct sequence of events for inhalation?
1. pressure of the atmosphere is greater than the pressure within the thorax
2. volume of the thorax increases and the pressure within the thorax decreases
