38. Which of the following sequences of events will occur when a person inhales while he is asleep?
A. The diaphragm muscles contract→atmospheric air rushes into the lungs→the lungs dilate
B. The intercostal muscles contract→atmospheric air rushes into the lungs→the lungs dilate
C. The diaphragm muscles contract→the lungs dilate→atmospheric air rushes into the lungs
D. The intercostal muscles contract→the lungs dilate→atmospheric air rushes into the lungs
點解D 唔係ANS?
Bio CE MC (gas exchange) exam next week~~plz help 2
2007-06-13 1:51 am
回答 (2)
2007-06-14 1:26 am
✔ 最佳答案
The steps of how breathing carrying out is written on the table below.The table explains why D is a wrong answer. Memorize this table; you may find it helpful, if you want to do so.descriptions
Inspiration
expiration
Diaphragm muscle
contract
relax
Diaphragm shape
flatten
Dome-shaped
External intercostals muscle
contract
Relax
internal intercostals muscle
relax
contract
Rib movement
Rise upwards
Move downwards
sternum
Move forwards
Move backwards
Thoracic cavity volume
increase
Decrease
Air pressure of lung
decrease
Increase
movement of air
Into the lungs
Out of the lungs
Lungs size
enlarged
Shrink(收縮)
I hope you may find my answer helpful.
2007-06-13 2:54 am
sleep既時候得 橫膈膜 工作,,intercostal muscle會停
==>a,c
lung dilate->volume increase->pressure decrease(lower than atmosphere)--> air rush in~
so,,air rush in after lung dilate,,
==> C
==>a,c
lung dilate->volume increase->pressure decrease(lower than atmosphere)--> air rush in~
so,,air rush in after lung dilate,,
==> C
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