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Oxygen Dissociation Curve

When partial ...

Question

When partial pressure of $C O_{2} (p C O_{2})$ rises, the oxygen dissociation curve of haemoglobin will

A

Become irregular

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B

Shift towards right

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C

Shift towards left

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D

Remain unchanged

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Solution

The correct option is B Shift towards right
Right shift

The oxygen dissociation curve is shifted to the right here. It shows the dissociation of $O_{2}$ from the haemoglobin (dissociation of oxyhaemoglobin). This curve is formed in the below mentioned conditions:

The partial pressure of $O_{2} (p O_{2})$ is low

$p C O_{2}$ (partial pressure of $C O_{2})$ is high

pH is low

Increase in $H^{+}$ ion concentration

Increase in temperature

Final answer: (4) Shift towards right

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Similar questions

$C O_{2}$ dissociates from carbamino haemoglobin when

(a) $p C O_{2}$ is high and $p O_{2}$ is low

(b) $p O_{2}$ is high and $p C O_{2}$ is low

(c) $p C O_{2}$ and $p O_{2}$ are equal

(d) None of the above

C O_{2}

concentration, Oxygen dissociation curve of haemoglobin will.

Q. The oxygen haemoglobin dissociation curve shifts either to right or left according to various factors. Shift to right indicates dissociation of oxygen from haemoglobin. Which of the following factors will shift the curve to the right?
(i) Decrease in partial pressure of oxygen.
(ii) Increase in partial pressure of

C O_{2}

(iii) Decrease in hydrogen ion concentration
(iv) Increase in

p H

(v) Increase in body temperature

Q. Dissociation curve for haemoglobin is obtained by plotting partial pressure of oxygen against percentage saturation of

Read the following statements and find out the incorrect statement $(s) .$

a .

C O_{2}

with haemoglobin is related to the partial pressure of

C O_{2} . p O_{2}

is a major factor which could affect this binding.

b .

p C O_{2}

p O_{2}

is high as in the alveoli, more binding of

C O_{2}

occurs, whereas when the

p C O_{2}

p O_{2}

is low as in the tissues, dissolution of

C O_{2}

from carbaminohaemoglobin takes place.

c .

At the tissue site, where partial pressure of

C O_{2}

is high due to catabolism,

C O_{2}

diffuses into blood

(R B C s and plasma)

H C O_{3}^{-}

H^{+} .

At the alveolar site where

p C O_{2}

is low, the reaction proceeds in the opposite direction leading to the formation of

C O_{2}

H_{2} O .

$d .$ Oxygen dissociation curve is highly useful in studying the effect of factor like $p C O_{2}, H^{+}$ concentration, etc., on binding of $O_{2}$ with haemoglobin.

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