Which one of the following is a possibility for
most of us in regard to breathing, by making a
conscious effort?
(a) One can breathe out air totally without
oxygen
(b) One can breathe out air through eustachian
tubes by closing both the nose and the mouth
(c) One can consiously breathe in and breathe
out by moving the diaphragm alone, without
moving the ribs at all
(d) The lungs can be made fully empty by
forcefully breathing out all air from them
Answers
Answered by
6
Possibility for most of us in regard to breathing, by making conscious effect is
(b) one can breathe out air through eustachian tubes by closing both nose and the mouth.
because of the following reason
*An eustachian tubes connect the middle ear cavity with pharynx.
*It helps in equalising the pressure on either side of ear drum
Answered by
6
One can consiously breathe in and breathe out by moving the diaphragm alone, without moving the ribs at all.
Explanation:
- Breathing is the action of the thoracic cavity to pull air into the lungs from the environment and pushing the same out.
- Breathing is done by increasing the volume of the thoracic cavity by means of expanding the thoracic muscles which causes negative pressure in lungs and it pulls air from the environment.
- The muscles involved in breathing are the intercostal muscles and phrenic muscles.
- Although 80% of the work of breathing is done by intercostal muscles during normal time, but it's possible to breath alone by the diaphragm or phrenic muscles with repeated practice.
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