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Regulation of Respiration

Chemosensitiv...

Question

Chemosensitive area of the respiratory centre in medulla is affected by

A

less $C O_{2}$ and $H^{+}$ ions

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B

less $O_{2}$ and $H^{+}$ ions

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C

excess $C O_{2}$ and $H^{+}$ ions

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D

excess $O_{2}$ and $H^{+}$ ions

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Solution

The correct option is C
excess $C O_{2}$ and $H^{+}$ ions

The chemosensitive area is sensitive to changes in $C O_{2} & H^{+}$ ion concentration in blood. Increase in these substances can activate this area, which in turn can signal the rhythm centre to make necessary adjustments in the respiratory process by which these substances can be eliminated.

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Similar questions

Q. Chemosensitive area of respiratory centre in medulla is affected by

C (d i a m o n d) + O_{2} \to C O_{2}; △ H = - 395 k J

C (g r a p h i t e) + O_{2} \to C O_{2}; △ H = - 393 k J

The heat of formation of the diamond from graphite is

Q. In response to

C O_{2}

H^{+}

concentration, the chemosensitive area and, receptors associated with aortic arch and carotid artery, send necessary signals for remedial action to _______________.

Choose the right sequential phenomena among the following during the delivery of

O_{2}

from blood to tissue.

P: Absorption of

C O_{2}

Q: Reaction of absorbed

C O_{2}

H_{2} O

H_{2} C O_{3}

within RBC and its conversion into

H^{+}

H C O_{3}^{-}

R: Reaction of absorbed

C O_{2}

H_{2} O

in plasma to form

H_{2} C O_{3}

and its conversion into

H^{+}

H C O_{3}^{-}

S: Combination of

H^{+}

with heme portion of

H b O_{2}

O_{2}

T: Combination of

H C O_{3}^{-}

with heme portion of

H b O_{2}

to form reduced hemoglobin and release of

O_{2}

Q. Choose the right sequential phenomena among the following during the delivery of

O_{2}

from blood tissue.
P : Absorption of

C O_{2}

by the blood.
Q : Reaction of absorbed

C O_{2}

H_{2} O

H_{2} C O_{3}

within RBC and its conversion into

H^{+}

H C O_{3}^{-}

ions in the presence of carbonic anhydrase enzyme.
R : Reaction of absorbed

C O_{2}

H_{2} O

in plasma to form

H_{2} C O_{3}

and its conversion into

H^{+}

H C O_{3}^{-}

ions in the presence of carbonic anhydrase enzyme.
S : Combination of

H^{+}

with heme portion of

H b O_{2}

O_{2}

.
T : Combination of

H C O_{3}^{-}

with heme portion

H b O_{2}

to form reduced hemoglobin and release of

O_{2}

.

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