Regarding Fluid Exchange In The Lungs Discussion
Order 59083647
Regarding Fluid Exchange In The Lungs Discussion
15.21 Regarding the pressure–flow relation of the pulmonary circulation,
a. pulmonary artery pressure increases as flow increases during exercise.
b. pulmonary artery pressure falls at high altitudes.
c. pressure and blood flow are greater in the base of the lungs than in the
apex during standing.
d. hypoxic pulmonary vasoconstriction is mediated by a rise in pulmonary
vascular myocyte cytosolic Ca2 concentration.
e. hypoxic pulmonary vasoconstriction tends to increase the inequalities in the
ventilation/perfusion ratios of alveoli.
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Regarding Fluid Exchange In The Lungs Discussion
15.22 Regarding fluid exchange in the lungs,
a. pulmonary capillary pressure is approximately one-third of systemic capillary
pressure at heart level.
b. lung lymph has a low colloid osmotic pressure.
c. lung airspaces are kept ‘dry’ by epithelial sodium channels (ENaC) and
basolateral Na–K pumps.
d. dyspnoea can arise from pulmonary vascular distension when left atrial
pressure increases.
e. pulmonary oedema develops when left atrial pressure reaches 10 mmHg.
Regarding Fluid Exchange In The Lungs Discussion
15.23 Cyanosis can result from
a. severe anaemia.
b. impaired O2 uptake caused by pulmonary oedema.
c. an uneven distribution of ventilation–perfusion ratios within the lungs.
d. a patent foramen ovale.
e. carbon monoxide poisoning.
Regarding Fluid Exchange In The Lungs Discussion
15.24 When a patient experiences a pulmonary embolism,
a. the embolus has usually arisen from an atheromatous plaque.
b. surgery of the pelvis or leg is a common predisposing event.
c. pressure falls in the pulmonary trunk.
d. left ventricular stroke volume rises.
e. central venous pressure rises.
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