Respiratory System, Physiology.
Questions with answers. Graded A+.
latest update.
what are the three overall functions of respiration - ✔✔-movement of gases, gas exchange, transport of
gases
breathing is also ref
...
Respiratory System, Physiology.
Questions with answers. Graded A+.
latest update.
what are the three overall functions of respiration - ✔✔-movement of gases, gas exchange, transport of
gases
breathing is also referred to as - ✔✔-pulmonary ventilation
Boyle's Law states that gas pressure in a closed container is ________ proportional to the volume of a
container - ✔✔-inversely
air flows from an area of __________ pressure to an area of _________ pressure - ✔✔-higher; lower
atmospheric pressure at sea level is - ✔✔-760 mm Hg
intrapleural pressure is ______________ than atmospheric pressure resulting in a ____________
pressure pulling against the lungs - ✔✔-lower; negative
the negative pressure in the pleural layers helps to keep the lungs - ✔✔-expanded
intrapulmonary pressure is the pressure - ✔✔-inside the lungs
inspiration / inhalation involves which muscles contracting - ✔✔-diaphragm and intercostal muscles
on inspiration, the volume of the thoracic cavity and lungs - ✔✔-increases
on expiration, the volume of the thoracic cavity and lungs - ✔✔-decreases
forced expiration involves the use of which "extra" muscles - ✔✔-abdominal
a cough or big exhalation is referred to as - ✔✔-forced exhalation
contraction / shrinking of the bronchioles by muscular contraction is regulated by the - ✔✔-
parasympathetic NS
opening of the bronchioles by muscular relaxation is regulated by the - ✔✔-sympathetic NS
surface tension in the alveoli tends to _________ expansion - ✔✔-oppose
what substance is made by alveolar cells in order to reduce surface tension - ✔✔-pulmonary surfactant
pulmonary surfactant is made up of - ✔✔-phospholipids and proteins
tidal volume is defined as - ✔✔-volume of air in or out of lungs at rest
average tidal volume = - ✔✔-500 ml (at rest)
normal respiratory rate is (breaths / min) - ✔✔-12 breaths / min
minute respiratory volume formula = - ✔✔-MRV = TV x RR
(TV = tidal vol; RR = respiratory rate)
inspiratory reserve volume is defined as - ✔✔-air that can be inspired
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