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The contraction of .......muscles lifts ...

The contraction of .......muscles lifts up the ribs and the sternum causing an increase in the volume of the thoracic chamber in the dorso-ventral axis.

A

External intercostal muscles

B

Internal intercostal muscles

C

Diaphragm

D

Both A and B

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The correct Answer is:
A
The contraction of external intercostal muscles lifts up the ribs and the sternum causing an increase in the volume of the thoracic chamber in the dorso-ventral axis.
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A2Z-BREATHING AND EXCHANGE OF GASES-Section A: Topicwise Questions Topic 2 : Mechanism Of Breathing (respiratory Volumes And Capacities)
  1. Inspiration is initiated by the contraction of

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  2. Contraction of diaphragm increases the volume of thoracic chamber in t...

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  3. The contraction of .......muscles lifts up the ribs and the sternum ca...

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  4. External and internal intercostal muscles are present in

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  5. Normal breathing rate of a healthy human is

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  6. In breathing movements, air volume can be estimated by

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  7. Additional volume of air, a person can expire by a forcible expiration...

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  8. Total volume of air a person can inspire after a normal expiration is ...

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  9. the amount of vloume of air that can be inspired / expired normally is...

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  10. The volume of air present in the lungs after forceful expiration is ca...

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  11. Volume of air that remain in the lungs after a normal expiration is ca...

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  12. Total volume of air a person can expire after a normal inspiration is ...

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  13. Total volume of air accommodated in the lungs at the end of a forced i...

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  14. Additional volume of air a person can inspire by a forcible inspiratio...

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  15. Match the columns I and II, and choose the correct combination from th...

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  16. Recognise the figure and find out the correct matching

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  17. Vital capacity, the maximum volume of air a person can inhale, is meas...

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  18. Muscles attached to diaphragm contract during inspiration to make it

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  19. Match the columns

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  20. Residual volume is

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