Respiratory mcqs 1 Flashcards
Which is NOT considered to be a primary function of the respiratory system?
A) regulation of water balance
B) regulation of pH balance
C) protection against pathogens
D) vocalization
E) gas exchange
A) regulation of water balance
2
Ventilation is also known as
A) breathing.
B) inspiration.
C) expiration.
D) air conduction.
E) blowing.
A) breathing.
3
The upper respiratory tract includes all EXCEPT which of the following?
A) nasal cavity
B) lungs
C) trachea
D) larynx
E) mouth
B) lungs
4
The lower respiratory tract includes
A) all of the bronchial branches.
B) only the lungs.
C) only the trachea.
D) all of the bronchial branches and the lungs
E) all of the bronchial branches, the lungs, and the trachea.
D) all of the bronchial branches and the lungs
5
Pulmonary ventilation refers to the
A) movement of air into and out of the lungs.
B) movement of dissolved gases from the alveoli to the blood.
C) movement of dissolved gases from the blood to the interstitial space.
D) movement of dissolved gases from the interstitial space to the cells.
E) utilization of oxygen.
A) movement of air into and out of the lungs.
6
Alveolar ventilation refers to the
A) movement of air into and out of the lungs.
B) movement of air into and out of the alveoli.
C) movement of dissolved gases from the alveoli to the blood.
D) movement of dissolved gases from the blood to the alveoli.
E) utilization of oxygen by alveolar cells to support metabolism.
B) movement of air into and out of the alveoli.
7
The actual sites of gas exchange within the lungs are
A) bronchioles.
B) alveolar ducts.
C) pleural spaces.
D) alveoli.
E) terminal sacs.
D) alveoli.
8
Place the following structures of the respiratory tree in the order in which air passes through them.
1. secondary bronchi
2. bronchioles
3. primary bronchi
4. alveoli
5. terminal bronchioles
A) 4, 1, 2, 3, 5
B) 1, 3, 5, 2, 4
C) 3, 1, 5, 2, 4
D) 3, 1, 2, 5, 4
E) 1, 3, 2, 5, 4
D) 3, 1, 2, 5, 4
9
The airway between the larynx and the primary bronchi is the
A) pharynx.
B) bronchiole.
C) trachea.
D) alveolar duct.
E) laryngeal duct.
C) trachea.
10
The lungs are enclosed in ________ membranes.
A) pericardial
B) pulmonary
C) pleural
D) thoracic
E) costal
C) pleural
11
The lungs are located in the ________ cavity.
A) pericardial
B) pulmonary
C) pleural
D) thoracic
E) costal
D) thoracic
12
Pressure and volume of gas in a container are related to temperature and number of gas molecules. This is known as ________ law.
A) the ideal gas
B) Boyle’s
C) Dalton’s
D) Henry’s
E) Ohm’s
A) the ideal gas
13
Type II alveolar cells
A) allow rapid diffusion of gases through their thin membranes.
B) secrete a chemical known as surfactant.
C) are phagocytic.
D) allow rapid diffusion of gases through their thin membranes, secrete a chemical known as surfactant, and are phagocytic.
E) None of the statements are true.
B) secrete a chemical known as surfactant.
14
Type I alveolar cells
A) allow rapid diffusion of gases through their thin membranes.
B) secrete a chemical known as surfactant.
C) are phagocytic.
D) allow rapid diffusion of gases through their thin membranes, secrete a chemical known as surfactant, and are phagocytic.
E) None of the statements are true.
A) allow rapid diffusion of gases through their thin membranes.
15
Which of the following features of the alveolar sacs allows for the ease of diffusion of gasses?
A) They are made of a single layer of simple squamous epithelium.
B) Type II alveolar cells secrete surfactant.
C) Elastin fibers allow the alveoli to stretch thin enough for diffusion to occur.
D) They are made of a single layer of simple squamous epithelium and elastin fibers allow the alveoli to stretch thin enough for diffusion to occur.
A) They are made of a single layer of simple squamous epithelium.
16
Surfactant
A) protects the surface of the lungs.
B) phagocytizes small particulate matter.
C) replaces mucus in the alveoli.
D) helps prevent the alveoli from collapsing.
E) is not found in healthy lung tissue.
D) helps prevent the alveoli from collapsing.
17
The common passageway shared by the respiratory and digestive systems is the
A) larynx.
B) glottis.
C) vestibule.
D) pharynx.
E) esophagus.
D) pharynx.
18
When the diaphragm and external intercostal muscles contract,
A) the volume of the thorax increases.
B) the volume of the thorax decreases.
C) the volume of the lungs decreases.
D) the lungs collapse.
E) expiration occurs.
A) the volume of the thorax increases.
19
Dalton’s law states that
A) gas volume and temperature are directly proportional.
B) gas volume and pressure are inversely proportional.
C) the volume of gas that will dissolve in a solvent is proportional to the solubility of the gas and the gas pressure.
D) in a mixture of gases like air, the total pressure is the sum of the individual partial pressures of the gases in the mixture.
E) None of the answers are correct.
D) in a mixture of gases like air, the total pressure is the sum of the individual partial pressures of the gases in the mixture.
20
Air moves into the lungs because
A) the gas pressure in the lungs is less than outside pressure.
B) the volume of the lungs decreases with inspiration.
C) the thorax is muscular.
D) contraction of the diaphragm decreases the volume of the pleural cavity.
E) All of the answers are correct.
A) the gas pressure in the lungs is less than outside pressure.
Answered
