3390013
Pregunta 1
Pregunta
Intercostal muscles are the most important muscles of respiration
Respuesta
- True
- False
Pregunta 2
Pregunta
Muller's maneuver measures maximum inspiratory pressure (MIP) developed against a block of the trachea at RV
Respuesta
- True
- False
Pregunta 3
Pregunta
Valsalva maneuver measures Expiratory muscle strength - measures maximum expiratory pressure (MEP) at RV
Respuesta
- True
- False
Pregunta 4
Pregunta
Cough - which statement is wrong
Respuesta
-
Sensory reflex loop - RARs (rapidly adapting receptors) detect irritants and stimulate trigeminal nerve -> brain stem -> motor neurons ->respiratory muscle contractions
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Sequence - deep inhalation -> forced expiration on closed glottis -> open glottis forced espiration
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3 most common cause of chronic cough (> 8 weeks) post nasal drip from rhinosinusitis, asthma and GERD
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Reaches a speed of 28,000 cm/sec, eject about 40,000 microdroplets which may contain >200,000 virus particles
Pregunta 5
Pregunta
Airflow and respiratory pressures are measured in cm of H2O because the pressure changes in the lung are so small that it is hard to see a 1 or 2 mmHg change
Respuesta
- True
- False
Pregunta 6
Pregunta
Regarding pressures all of the following are true except
Respuesta
-
P(alveolar) = P(barometric) at end inspiration and end expiration
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P(alveolar) = P(Barometric) here is no air flow and glottis is closed
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When P(alveolar) > P(barometric) the direction of airflow is - out of lungs (expiration)
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PL = PA-Ppl
Pregunta 7
Pregunta
During Respiration the following is the sequence except
Respuesta
-
Inspiratory muscles contract -> thoracic cavity expands
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Pleural pressure becomes more negative (-5 to -8 cm of H2O)
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Transpulmonary pressure decreases
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lungs inflate and alveolar pressure becomes subatmospheric --> air flows into the lungs until alveolar pressure equals atmospheric pressure
Pregunta 8
Pregunta
Boyles law
Respuesta
-
P1V1 = P2V2
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During inspiration Alveolar Pressure drops and volume increases
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During inspiration Pleural pressure increases (becomes more negative) and volume decreases
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1,2,3 are correct
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1,2 are correct
-
2,3 are correct
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