Choose the option that indicates incorrect fact associated with the given event.
(a) |
| Normal | inspiration | - |
| Contraction of external | intercostal muscles | ||||||
Normal | |||||||||||||
inspiration | |||||||||||||
Contraction of external | |||||||||||||
intercostal muscles | |||||||||||||
(b) |
| Forceful | expiration | - |
| Contraction of | additional muscles of | abdomen | |||||
Forceful | |||||||||||||
expiration | |||||||||||||
Contraction of | |||||||||||||
additional muscles of | |||||||||||||
abdomen | |||||||||||||
| Normal | expiration | - |
| Diaphragm arches | upward | |||||||
Normal | |||||||||||||
expiration | |||||||||||||
Diaphragm arches | |||||||||||||
upward | |||||||||||||
(d) |
| Normal | inspiration | - |
| Volume of thoracic | cavity decreases | ||||||
Normal | |||||||||||||
inspiration | |||||||||||||
Volume of thoracic | |||||||||||||
cavity decreases |
Text Solution
Verified by ExpertsD
During normal inspiration, volume of thoracic cavity is increased as a result of contraction of diaphragm and external intercostal muscles.
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