Q: Which of the following is the correct formula for calculating Inspiratory Reserve Volume (IRV) given Vital Capacity (VC), Tidal Volume (TV), and Expiratory Reserve Volume (ERV)?

$$\text{IRV} = \text{VC} - (\text{TV} + \text{ERV})$$

Question 1

Which structure prevents food from entering the trachea during swallowing?

Accepted Answer

Epiglottis

Question 2

A patient is found to have damage to the inferior nasal conchae. Which function is most likely to be impaired?

Accepted Answer

Filtering and humidifying inhaled air

Question 3

Which of the following is the correct formula for calculating Inspiratory Reserve Volume (IRV) given Vital Capacity (VC), Tidal Volume (TV), and Expiratory Reserve Volume (ERV)?

Accepted Answer

$$	ext{IRV} = 	ext{VC} - (	ext{TV} + 	ext{ERV})$$

Question 4

A histology slide of the trachea shows pseudostratified ciliated columnar epithelium and hyaline cartilage. Which feature distinguishes this tissue from lung alveoli?

Accepted Answer

Presence of hyaline cartilage

Question 5

During a spirometry test, a patient’s Tidal Volume (TV) is 500 mL, Expiratory Reserve Volume (ERV) is 1200 mL, and Vital Capacity (VC) is 4000 mL. What is the Inspiratory Reserve Volume (IRV)?

Accepted Answer

2300 mL

Question 6

Which of the following best describes the function of the nasal meatuses?

Accepted Answer

Increase surface area for air filtration and humidification

Question 7

The hilum of the lung is best described as:

Accepted Answer

The region where bronchi, blood vessels, and nerves enter and exit the lung

Question 8

Which lobe is unique to the left lung and is absent in the right lung?

Accepted Answer

Middle lobe

Question 9

A patient with a collapsed lung (pneumothorax) is most likely to have impaired function in which structure?

Accepted Answer

Alveoli

Question 10

Which of the following is NOT a function of the soft palate?

Accepted Answer

Producing mucus for air humidification

Question 11

Which structure is directly responsible for voice production?

Accepted Answer

Vocal folds within the larynx

Question 12

Which of the following best describes the function of a spirometer?

Accepted Answer

Measures lung volumes and capacities

Question 13

Which of the following structures is found at the base of the lung and is essential for inspiration?

Accepted Answer

Diaphragm

Question 14

A histology slide of lung tissue shows simple squamous epithelium and no cartilage. What is the primary function of this tissue?

Accepted Answer

Gas exchange

Question 15

Which of the following is the correct sequence of air flow from the nostrils to the alveoli?

Accepted Answer

Nostril → Nasal cavity → Pharynx → Larynx → Trachea → Bronchi → Bronchioles → Alveoli

Question 16

If a patient’s Vital Capacity (VC) is 4500 mL, Tidal Volume (TV) is 600 mL, and Expiratory Reserve Volume (ERV) is 1100 mL, what is their Inspiratory Reserve Volume (IRV)?

Accepted Answer

2800 mL

Question 17

Which of the following is true regarding the right lung compared to the left lung?

Accepted Answer

The right lung has three lobes, while the left lung has two lobes

Question 18

Which structure is located between the oropharynx and the trachea?

Accepted Answer

Larynx

Question 19

Which of the following is a distinguishing feature of the respiratory tissue in the trachea compared to the bronchioles?

Accepted Answer

Presence of cartilage rings

Question 20

A patient is unable to produce mucus in the respiratory tract. Which cell type is most likely deficient?

Accepted Answer

Goblet cells

Respiratory System: Anatomy, Histology, and Pulmonary Volumes

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