Physio II

ivenkat
Quiz by ivenkat, updated more than 1 year ago
ivenkat
Created by ivenkat about 6 years ago
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Resource summary

Question 1

Question
Intercostal muscles are the most important muscles of respiration
Answer
  • True
  • False

Question 2

Question
Muller's maneuver measures maximum inspiratory pressure (MIP) developed against a block of the trachea at RV
Answer
  • True
  • False

Question 3

Question
Valsalva maneuver measures Expiratory muscle strength - measures maximum expiratory pressure (MEP) at RV
Answer
  • True
  • False

Question 4

Question
Cough - which statement is wrong
Answer
  • Sensory reflex loop - RARs (rapidly adapting receptors) detect irritants and stimulate trigeminal nerve -> brain stem -> motor neurons ->respiratory muscle contractions
  • Sequence - deep inhalation -> forced expiration on closed glottis -> open glottis forced espiration
  • 3 most common cause of chronic cough (> 8 weeks) post nasal drip from rhinosinusitis, asthma and GERD
  • Reaches a speed of 28,000 cm/sec, eject about 40,000 microdroplets which may contain >200,000 virus particles

Question 5

Question
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
Answer
  • True
  • False

Question 6

Question
Regarding pressures all of the following are true except
Answer
  • P(alveolar) = P(barometric) at end inspiration and end expiration
  • P(alveolar) = P(Barometric) here is no air flow and glottis is closed
  • When P(alveolar) > P(barometric) the direction of airflow is - out of lungs (expiration)
  • PL = PA-Ppl

Question 7

Question
During Respiration the following is the sequence except
Answer
  • Inspiratory muscles contract -> thoracic cavity expands
  • Pleural pressure becomes more negative (-5 to -8 cm of H2O)
  • Transpulmonary pressure decreases
  • lungs inflate and alveolar pressure becomes subatmospheric --> air flows into the lungs until alveolar pressure equals atmospheric pressure

Question 8

Question
Boyles law
Answer
  • P1V1 = P2V2
  • During inspiration Alveolar Pressure drops and volume increases
  • During inspiration Pleural pressure increases (becomes more negative) and volume decreases
  • 1,2,3 are correct
  • 1,2 are correct
  • 2,3 are correct
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