chap 20 Flashcards
bio respiratory
The process called__________ involves gas exchange between the atmosphere and the cells
of the body and the resulting chemical reactions that provide the cells with energy to
function.
A) breathing
B) oxidation
C) respiration
D) metabolism
C) respiration
How is carbon dioxide transported in the blood?
A) 70% transported as HCO3
; 23% bound to hemoglobin; 7% dissolved in plasma
B) 98% bound to hemoglobin; 2% transported as HCO3
C) 50% transported as HCO3
; 25% bound to hemoglobin; 25% dissolved in plasma
D) 95% transported as HCO3
; 3% bound to hemoglobin; 2% dissolved in plasma
A) 70% transported as HCO3
; 23% bound to hemoglobin; 7% dissolved in plasma
How is oxygen transported in the blood?
A) 98% bound to hemoglobin; 2% dissolved in plasma
B) 95% bound to hemoglobin; 3% bound to albumin; 2% dissolved in plasma
C) 90% bound to hemoglobin; 10% dissolved in plasma
D) 100% bound to hemoglobin
A) 98% bound to hemoglobin; 2% dissolved in plasma
88) During an asthma attack, patients find it most difficult to__________.
A) exhale
B) inhale
C) contract the respiratory muscles
D) expand the lungs
A) exhale
Why are smokers more susceptible to respiratory infections?
A) They congregate in small areas to smoke, increasing their exposure to exhaled smoke.
B) Their respiratory passages overproduce cilia, to which bacteria cling.
C) Their respiratory passages lose cilia, which would otherwise remove bacteria.
D) Their respiratory passages have too little mucus and are unable to trap inhaled
particles.
C) Their respiratory passages lose cilia, which would otherwise remove bacteria.
Which of the following does not directly affect breathing rate?
A) Partial pressure of oxygen in body fluids
B) Partial pressure of carbon dioxide in body fluids
C) Degree of lung tissue stretch
D) Size of residual volume
D) Size of residual volume
Receptors called__________ are located in the ventral part of the medulla oblongata near the
origin of the vagus nerve.
A) baroreceptors
B) mechanoreceptors
C) central chemoreceptors
D) peripheral chemoreceptors
C) central chemoreceptors
What is typically the underlying cause of adult sleep apnea?
A) Unresponsiveness of central chemoreceptors
B) A deep sleep state in which respiration markedly slows
C) Obstruction of upper airways
D) Nasal congestion
C) Obstruction of upper airways
What drives the air out of the lungs during quiet expiration?
A) Contraction of the diaphragm
B) Contraction of the external intercostal muscles
C) Surface tension and the elastic recoil of lung tissues
D) Contraction of smooth muscles in airways
C) Surface tension and the elastic recoil of lung tissues
The right lung has__________ lobes; the left lung has__________ lobes.
A) three; two
B) two; two
C) three; three
D) two; three
A) three; two
The pharynx functions as a passageway for__________, whereas the larynx functions as a
passageway for__________.
A) passageway for air and food; passageway for food only
B) passageway for air only; passageway for air and food
C) passageway for air and food; passageway for air only
D) passageway for food only; passageway for air only
C) passageway for air and food; passageway for air only
What is the correct order of structures, from superior to inferior?
A) Nasopharynx → oropharynx → laryngopharynx
B) Oropharynx → laryngopharynx → nasopharynx
C) Oropharynx → nasopharynx → laryngopharynx
D) Laryngopharynx → oropharynx → nasopharynx
A) Nasopharynx → oropharynx → laryngopharynx
Where are the vocal cords located?
A) In the pharynx
B) In the larynx
C) In the trachea
D) In the oral cavity
B) In the larynx
Chronic obstructive pulmonary disease (COPD) includes which respiratory disorders?
A) Lung cancer and cystic fibrosis
B) Chronic bronchitis and emphysema
C) Smoker’s lung and asthma
D) Pneumothorax and alveolitis
B) Chronic bronchitis and emphysema
Which of the following does not contain a paranasal sinus?
A) maxilla
B) frontal bone
C) sphenoid bone
D) zygomatic bone
D) zygomatic bone
