Question 1

Which of the following is NOT a function of the nasal conchae in the respiratory system?

Accepted Answer

Initiating the cough reflex

Question 2

A patient presents with inflammation of the nasal mucosa, excessive mucus production, and pressure in the sinus region. Which condition is most likely responsible?

Accepted Answer

Sinusitis

Question 3

Which anatomical structure serves as the passageway for both air and food, and is divided into three regions?

Accepted Answer

Pharynx

Question 4

During inspiration, which muscle contracts and moves downward to increase thoracic cavity volume?

Accepted Answer

Diaphragm

Question 5

Which equation best describes the relationship between pressure and volume changes during pulmonary ventilation?

Accepted Answer

$$P_1$$ $$V_1$$ = $$P_2$$ $$V_2$$

Question 6

A premature infant is experiencing collapsed alveoli after each breath due to insufficient surfactant. What is the primary physiological consequence?

Accepted Answer

Decreased lung compliance

Question 7

Which of the following best explains why gas flow in the respiratory tree is generally not significantly affected by airway resistance?

Accepted Answer

The large diameters of airways and increased total cross-sectional area

Question 8

A patient with chronic obstructive pulmonary disease (COPD) is likely to experience which of the following changes in lung function?

Accepted Answer

Irreversible decrease in ability to force air out of lungs

Question 9

Which of the following best describes the Bohr effect in oxygen transport?

Accepted Answer

Decreased affinity of hemoglobin for oxygen in the presence of high $$P_{CO_2$}$$ and low pH

Question 10

Which of the following equations represents the loading of oxygen onto hemoglobin?

Accepted Answer

$$HHb + O_2$ \rightleftharpoons $$HbO_2$$ + H^+$$

Question 11

Which of the following is the most potent chemical factor influencing breathing rate and depth under normal conditions?

Accepted Answer

Blood $$P_{CO_2$}$$

Question 12

A person at high altitude experiences headaches, shortness of breath, and dizziness. Which physiological change is primarily responsible?

Accepted Answer

Decreased $$P_{O_2$} in $$inspired air

Question 13

Which of the following best describes the effect of sympathetic stimulation on the bronchioles?

Accepted Answer

Bronchodilation

Question 14

Which of the following is true regarding the partial pressure gradient for oxygen between alveolar air and venous blood?

Accepted Answer

Alveolar $$P_{O_2$} is $$much higher than venous blood $$P_{O_2$}$$

Question 15

Which of the following conditions is characterized by permanent enlargement of alveoli and destruction of alveolar walls?

Accepted Answer

Emphysema

Question 16

A patient with obstructive sleep apnea is most likely to benefit from which intervention?

Accepted Answer

Continuous positive airway pressure (CPAP) device

Question 17

Which of the following best explains why rapid, shallow breathing decreases alveolar ventilation rate (AVR)?

Accepted Answer

A greater proportion of each breath remains in dead space

Question 18

Which of the following is a consequence of decreased lung compliance?

Accepted Answer

Greater energy required for breathing

Question 19

Which of the following best describes the effect of high alveolar $$P_{CO_2$} on $$bronchiolar diameter?

Accepted Answer

Bronchioles dilate

Question 20

Which of the following is the correct formula for calculating minute ventilation?

Accepted Answer

$$Minute\ Ventilation = Tidal\ Volume 	imes Respiratory\ Rate$$

Chapter 22: The Respiratory System – Anatomy & Physiology Study Notes

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