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BIO 242 Exam 4 questions
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BIO 242 Exam 4 questions BIO 242 Exam 4 questions BIO 242 Exam 4 questions
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BIO 242 Exam 4 questionsWhat specifically describes the movement of air into and out of the lungs? - correct answer
pulmonary ventilation
Intrapleural fluid is incompressible, which means that its volume does not change even as the chest
wall expands and contracts as one breathes. - correct answer True
The mucus escalator involves cilia causing movement of mucus with its trapped particles toward the
alveoli where the particles can be engulfed by alveolar macrophages. - correct answer FALSE
Which cells form the lung tissue component of the respiratory membrane? - correct answer type I
alveolar cells
What keeps the visceral pleura in close proximity to the parietal pleura? - correct answer surface
tension of the intrapleural fluid
The transition from the conducting to the respiratory zone in the lungs occurs at
the_______________. - correct answer respiratory bronchioles
Why are alveoli arranged in small grape-like clusters? - correct answer maximize surface area and
minimize thickness
What is the primary determinant of airway resistance? - correct answer airway radius
At rest, expiration is a(n) ________ process that involves ________. - correct answer passive :
relaxation of the diaphragm and external intercostals
Which muscles, when contracted, would increase the volume of air in the thoracic cavity? - correct
answer diaphragm and external intercostals
Which pressure is the result of the natural tendency of the lungs to decrease their size (because of
elasticity) and the opposing tendency of the thoracic wall to pull outward and enlarge the lungs? -
correct answer intrapleural pressure
, During an allergic reaction, which of the following would aid respiration?
A) histamine
B) epinephrine
C) acetylcholine (ACh)
D) an increase in the parasympathetic nervous system - correct answer epinephrine
If the transpulmonary pressure equals zero, what will happen to the lung? - correct answer the
lungs will collapse
The two types of sleep apnea are either cessation of breathing due to airway __________ or due to
__________ problems. - correct answer obstruction; neurological
If sleep apnea is due to __________, it could involve temporary closure of any portion of the
__________ airway. - correct answer obstruction; upper airway
Excessive relaxation of muscles in the upper airways, causing airway collapse is the most common
reason for __________ sleep apnea. - correct answer obstructive
Individuals that are __________ are more susceptible to the __________ type of sleep apnea, which
runs in families. - correct answer overweight; obstructive
The obstructive pulmonary diseases include __________, __________, and __________. - correct
answer asthma; emphysema; bronchitis
According to Poiseuille's law, the most significant contributor to __________ in a pipe, which
includes blood vessels and airways, is the __________. - correct answer resistance; radius
Compliance equals a change in volume divided by a change in pressure. If airway structures lose
elastic fibers as a result of increased protein breakdown by proteases, compliance will __________.
Hints - correct answer increase
Surface tension of water is one of the factors affecting lung compliance. A chemical produced in the
lung, known as __________, is responsible for reducing surface tension of water in the lungs. -
correct answer surfactant
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