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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.

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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 .

Fill up the blanks in the following paragraph by selecting the correct option. Human beings have a significant ability to maintain and moderate the respiratory rhythm to suti the demands of the body tissues. This is done by the neural system. A specialised centre present in the medulla region of the brain called overset((i))"_______" is primarily responsible for this regulation. Another centre present in the pons region of the brain called overset((ii))"_______" can moderate the functions of the repiratory rhytm cenre. Neutral signal from this cenre cen reduce the duration of overset((iii))"_______" and thereby alter the respiratory rate. A overset((iv))"_______" is situated adjacent to the rhythm centre which is highly sensitive to CO_(2) and hydrogen ions.

Pick out the correct statements: a) Pneumotaxic centre moderates the functioning of respiratory rhythm centre. b) Pneumotaxic centre is primarily responsible for regulation of respiratory movements. c) Decrease in pH of cerebrospinal fluid is detected by medulla. d) The role of carbon dioxide in the regulation of respiratory rhythm is quite insignificant.

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 pneumotaxic centre is to control the switch off point of inspiratory signal and thus limit inspiraton (iii) the chemosensitve area for brain for respiratory control is highly sensitive to O_(2) concentration (iv) In case of fetal haemoglobin the oxygen haemoglobin dissociation curve is shifted toward left which of these are correct ? (a) i, ii & iv (b) ii and iv (c) ii, iii & iv (d) iii and iv

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 ?

ALLEN-BREATHING AND EXCHANGE OF GASES-S
  1. Assertion : The role of oxygen in the regulation of respiratory rhythm...

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  2. What will be the P(O2) and P(CO2) in the atmospheric air compared to t...

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  3. What is the amount of O(2) supplied to tissues through every 100 ml. o...

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  4. Inspiration can occur , when -

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  5. Find out the amount of CO(2) which is delivered by every 100 ml of deo...

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  6. Cellular barriers between alveolar air and capillary blood are -

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  7. Which statements are correct ? (A) During inspiration intra pulmonary...

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  8. If in a person functional residual capacity (FRC) is 2300 ml, residual...

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  9. Match item in column A with those given in column B.

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  10. In the alveoli, dissociation of CO(2) from carbamino haemoglobin occur...

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  11. Find out partial pressure of O(2) and CO(2) in oxygenated blood.

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  12. What is true about regulation of respiration -

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  13. Functional residual capacity is -

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  14. In human beings, CO(2) concentration in the inspired and expired air i...

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  15. Which statement correctly defines Bohr effect ?

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  16. Which of the following statement is wrong ? .

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  17. Which of the following cause increased strength of inspiratory as well...

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  18. Which of the following pulmonary volume can't be measured by spiromete...

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  19. TheP(H) of venous blood is only slightly more acidic than the P(H) of ...

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  20. Which muscle contracts during normal expiration?

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  21. The epithelial tissue present on the inner surface of bronchioles and ...

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