Home
Class 12
BIOLOGY
What happens to ribs and sternum during ...

What happens to ribs and sternum during contraction of external intercostal muscles ?

Text Solution

AI Generated Solution

**Step-by-Step Solution:** 1. **Identify the Muscles Involved**: The external intercostal muscles are the primary muscles involved in the process of inspiration (breathing in). 2. **Understand the Action of the Muscles**: During contraction, the external intercostal muscles pull the ribs upward and outward. 3. **Effect on Ribs and Sternum**: When the external intercostal muscles contract, both the ribs and the sternum are lifted. This movement occurs in an outward direction. ...
Promotional Banner

Topper's Solved these Questions

  • BREATHING AND EXCHANGE OF GASES

    AAKASH INSTITUTE ENGLISH|Exercise EXERCISE|30 Videos

  • BREATHING AND EXCHANGE OF GASES

    AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT SECTION - A|35 Videos

  • BREATHING AND EXCHANGE OF GASES

    AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT SECTION - D|11 Videos

  • BODY FLUIDS AND CIRCULATION

    AAKASH INSTITUTE ENGLISH|Exercise Assignment Section - D Assertion - Reason Type Questions|9 Videos

  • CELL CYCLE AND CELL DIVISION

    AAKASH INSTITUTE ENGLISH|Exercise SECTION-D (Assertion-Reason Type Questions )|10 Videos

Similar Questions

Explore conceptually related problems

The contraction of internal intercostal muscles in man causes

During muscle contraction

During contraction of muscles :-

During muscle contraction

During muscle contraction

During muscle contraction

Intercostal muscles occur in

During contraction of skeletal muscle Ca^(2+) bind to

Select the correct events that occur during inspration. (a) Contraction of diaphragm (b) Contraction of external inter-costal muscles (c) Pulmonary volume decreases (d) Intra pulmonary pressure increases

Which of the following help to increase the volume of the thoracic chamber during the mechanism of breathing? (a) The contraction of diaphragm (b) Contraction of external intercostal muscle (c) The uplifting of sternum (d) All of the above

AAKASH INSTITUTE ENGLISH-BREATHING AND EXCHANGE OF GASES -Try Yourself
  1. What is glottis ?

    Text Solution

    |

  2. What is the effect on the volume of pulmonary cavity when volume of th...

    Text Solution

    |

  3. What happens to ribs and sternum during contraction of external inter...

    Text Solution

    |

  4. Name the additional muscles which help in increasing the strength of b...

    Text Solution

    |

  5. What happens when the pressure within the pulmonary cavity is more th...

    Text Solution

    |

  6. What is the normal value of tidal volume, residual volume, and total l...

    Text Solution

    |

  7. What is respiratory valume ?

    Text Solution

    |

  8. What are the factors on which vital capacity of lungs depend ?

    Text Solution

    |

  9. How can you estimate the value of functional residual capacity (FRC) ?

    Text Solution

    |

  10. In which of the following vital capacity is maximum ? Athlete, Old ...

    Text Solution

    |

  11. Among all the respiratory volumes which one has lowest value ?

    Text Solution

    |

  12. Which epithelium lines the alveoli ?

    Text Solution

    |

  13. Which gas, out of O(2) and CO(2) is more soluble ?

    Text Solution

    |

  14. What is the thickess of diffusion membrane ?

    Text Solution

    |

  15. How many layers form the diffusion membrane ?

    Text Solution

    |

  16. Why is CO(2) gas transferred from alevoli to atmospheric air ?

    Text Solution

    |

  17. Which gas has higher partial pressure in tissues ?

    Text Solution

    |

  18. What is the shape of O(2) dissociation curve for haemoglobin ?

    Text Solution

    |

  19. Which of the following factors is not favourable for the formation of ...

    Text Solution

    |

  20. What is formed when oxygen combines with haemoglobin?

    Text Solution

    |