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4. Contraction of the intercostal muscles and diaphragm cause the thoracic cavity toand the air pressure in the lungs to[ ]A) expand; decreaseB) expand; increaseC) contract; increaseD) contract; decrease |
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Answer» Explanation: The correct option is A because when Contraction of intercostal muscles and DIAPHRAGM TAKES place the thoracic cavity expands because the PRESSURE of lungs before inspiration is equal to the PRESURE of 1 atm. During Inspiration, The volume of lungs increase the pressure in the lungs decreases. if you are satisfy with my ans then mark me as a brainlist if there is something wrong then kindly rectify through my question or inbox so that i can rectify myself. more queries about it can dm me on insta. THANK u |
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