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Inhalation and Exhalation

During respir...

Question

During respiration if the volume of thoracic cavity of rabbit is maximum, then

A

Inspiration is impossible

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B

Expiration is impossible

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C

Both are impossible

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D

None of the above

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Solution

The correct option is A Inspiration is impossible
During respiration, the volume of the thoracic cavity changes like it fills with air during the inspiration and volume decrease in the process of expiration. So, the volume of the thoracic cavity is maximum, there will be no space for the entry of air. So, inspiration is completely impossible. So, the correct option is A.

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Similar questions

Q. Identify the sequence of steps involved during inspiration in rabbit.
(A) Volume of thoracic cavity increases
(B) Contraction of external intercostal muscles moves the rib cage forward
(C) Diaphragm becomes flat
(D) Thoracic cavity expands drawing air into lungs.

Q. During inspiration, the diaphragm__________________ and the expansion of the thoracic cavity is in the ___________________ direction

Q. Which of the following increases area of thoracic cavity during inhalation?

Q. Assertion :Changes in volume of thoracic cavity reflect on volume of pulmonary cavity. Reason: We can alter the pulmonary volumes directly for breathing.

Q. Select the correct statement.
i) Thoracic chamber is an open chamber filled with air.
ii) Thoracic chamber is built by dorsal ribs, ventral vertebral column, lower diaphragm and a lateral sternum.
iii) Any change in the thoracic cavity volume is not reflected in the lung cavity because of the anatomical setup of the lungs in the thorax.
iv) Humans can’t directly alter the pulmonary volume.

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