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Inspiration results from
  • a)
    Straightening of diaphragm+ contraction of internal inter-costal muscles
  • b)
    Straightening of diaphragm+ relaxation of inter-costal muscles
  • c)
    Straightening of diaphragm+ contraction of external inter-costal muscles
  • d)
    None
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
Inspiration results froma)Straightening of diaphragm+ contraction of i...
At the time of inspiration , contraction in diaphragm and external intercostal muscles takes place ... Diaphragm becomes flat and is pushed towards abdominal cavityy and sternum moves towards ventral and anterior directionnn...
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Community Answer
Inspiration results froma)Straightening of diaphragm+ contraction of i...
Option c is correct when diaphragm contract then it's dome shape structure is convert into straight (flat) because of this volume of thoracic cavity increases upward downward side and contraction of external intercostal muscle because external muscle pull the internal muscle and volume of thoracic cavity dorso ventarly and if *volume of thoracic cavity increases then pressure decrease and air move from high pressure to low and air rushes int lungs.
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Inspiration results froma)Straightening of diaphragm+ contraction of internal inter-costal musclesb)Straightening of diaphragm+ relaxation of inter-costal musclesc)Straightening of diaphragm+ contraction of external inter-costal musclesd)NoneCorrect answer is option 'C'. Can you explain this answer?
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