Home
Class 11
BIOLOGY
Assertion : The role of oxygen in the re...

Assertion : The role of oxygen in the regulation of respiratory rhythm is quite insignificant.
Reason : Increased `PCO_(2)` and `H^(+)` concentration inputs from chemoreceptors can activate respirotory rhytm centre to make necessary adjustments.

A

If both assertion and reason are true and reason is the correct explanation of assertion

B

If both assertion and reason are true and reason is not the correct explanation of assertion

C

If assertion is true but reason is false.

D

If both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • BODY FLUIDS AND CIRCULATION

    NCERT FINGERTIPS|Exercise Body Fluids And Circulation|151 Videos

  • CELL - THE UNIT OF LIFE

    NCERT FINGERTIPS|Exercise Cell - The Unit Of Life|159 Videos

Similar Questions

Explore conceptually related problems

Assertion :- Pneumotaxic centre can moderate the functions of the respiratory rhythm centre. Reason :- Neural signal from pneumotoxic centre can reduce the duration of inspiration and thereby the alter the respiratory centre

Assertion (A) In brain stem, pons is called pneumotaxic centre with the ability to moderate the function of the ' respiratory rhythm' centre. Reason ( R) Neural signals from the centre can reduce the duration of expiration, thereby alter the respiratory rate

Assertion: Chemosensitive area is situated adjacent to l the rhythm centre which ishighly sensitiveo CO_(2) and 1 hydrogen ions. Reason: Receptors associated with aortic arch and carotidis artery can recognise changes in O_(2)" and "H^(+) concentration and send necessary signals to the rhythm centre for remedial actions.

Which of the following statements are CORRECT ? I. A specialized center present in the medulla region of the brain called respiratory rhythm center is primarily responsible for the regulation of respiration. II. A Chemosensitive area is situated adjacent to the rhythm which is highly sensitive to O_2,CO_2 and hydrogen ions . III . Receptors associated with aortic arch and carotid artery also can recognize changes in CO_2 and H^+ concentration and send necessary signals to the rhythm center for remedial actions. IV The neural signal from the pneumatic center can increase the duration of inspiration and thereby alter the respiratory rate .

A: When a person starts doing exercise, rate and depth of breathing increases even before there are changes in pO_(2), pCO_(2) or H^(+) concentration. R: The main stimulus for these quick changes is due to input from the proprioreceptors, which monitor movements of joints and muscles.

Go through the following statements (i) the peripheral chemoreceptors for regulation of respiration are located in carotid veins and arch of aorta (ii) the primary effect of penumotaxic centre is to control the switch off point of inspiratory signal and thus limit inspiraton (iii) the chemosensitve area fo brain for respiratory control is highly sensitive to O_(2) concentration (iv) i case of feital haemoglobin the oxygen haemoglobin dissociation curve is shifted toward left ltrbgt which of these ar correct ?

Assertion: All the factors in our body are favourable for diffusion of O_(2) from alveoli to tissues and that of CO_(2) from tissues to alveoli. Reason: The role of oxygen in the regulationf respiratory rhythm is quite significa

Read the following statement . a) High H^+ concentration and higher temperature are favourable for dissociation of oxygen from oxyhaemoglobin. b) Partial pressure of oxygen in alveoli is higher than in tissue . c) The maximum volume of air a person can breather in after a forced expiration is vital capacity. d) In alveoli PCO_2 low and PO_2 high are for dissociation of CO_2 from carbamino haemoglobin . How many of the above statement are true ?

NCERT FINGERTIPS-BREATHING AND EXCHANGE OF GASES-Breathing And Exchange Of Gases
  1. CO(2) dissociates from carbamino haemoglobin when

    Text Solution

    |

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

    Text Solution

    |

  3. From the following relationship between respiration volumes and capaci...

    Text Solution

    |

  4. The oxygen - haemoglobin dissociation curve will show a right shift in...

    Text Solution

    |

  5. Match the following and mark the correct options.

    Text Solution

    |

  6. Assertion : Vocal cords consists of three pairs of mucous membrane tha...

    Text Solution

    |

  7. Assertion : Tracheae, primary, secondary and tertiary bronchi are supp...

    Text Solution

    |

  8. Assertion : The lungs are situated in thoracic chamber which is anatom...

    Text Solution

    |

  9. Assertion : The abdominal muscles are primarily involved in generating...

    Text Solution

    |

  10. Assertion : If two men, expire the same volume of air after normal ins...

    Text Solution

    |

  11. Assertion : Alveoli are the primary sites for exchange of gases. Rea...

    Text Solution

    |

  12. Assertion : A sigmoid curve is obtained when percentage saturation of ...

    Text Solution

    |

  13. Assertion : A rise in PCO(2), H^(+) ions and temperature shifts the Hb...

    Text Solution

    |

  14. Assertion : At the tissue level, 70 percent of CO(2) formed from conta...

    Text Solution

    |

  15. Assertion : Chloride shift is exchange of Cl^(-) of plasma and HCO(3)^...

    Text Solution

    |

  16. Assertion : The role of oxygen in the regulation of respiratory rhythm...

    Text Solution

    |

  17. Assertion : Pneumotaxic centre, located in the medulla region of the b...

    Text Solution

    |

  18. Assertion : Emphysema is the permanent abnormal inflation of air space...

    Text Solution

    |

  19. Asertiion : Inspirations occurs when there is a negative pressure in t...

    Text Solution

    |

  20. Assertion : Asthma is a difficulty in breathing caushing wheezing. R...

    Text Solution

    |