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Standard XII

Biology

Exchange of Gases

In humans, wh...

Question

In humans, which among these is not a step in respiration?

Diffusion of O2 and CO2 between blood and tissues

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Utilisation of CO2 by cells for catabolic reactions

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Alveolar diffusion of O2 and CO2

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Transport of gases by blood

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Solution

The correct option is B
Utilisation of CO2 by cells for catabolic reactions

In humans, respiration involves the following steps:
- Pulmonary ventilation
- Alveolar diffusion of $O_{2}$ and ${C O}_{2}$
- Transport of gases by blood
- Diffusion of $O_{2}$ and ${C O}_{2}$ between blood and tissues
- Utilisation of $O_{2}$ by cells for catabolic reactions and the resultant release of ${C O}_{2}$

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Similar questions

For completion of respiration process, write the given steps in sequential manner.

(a) Diffusion of gases $(O_{2} a n d C O_{2})$ across alveolar membrane.

(b) Transport of gases by blood.

(d) Pulmonary ventilation by which atmospheric air is drawn in and $C O_{2}$ rich alveolar air is released out.

(e) Diffusion of $O_{2} a n d C O_{2}$ between blood and tissues.~

Q. Respiration involves following steps:
A. Diffusion of gases

O_{2}

and

{C O}_{2}

across alveolar membrane.
B. Transport of gases by blood.
C. Utilization of

O_{2}

by cell for catabolic reaction and resultant release of

O_{2}

.
D. Pulmonary ventilation by which atmospheric air is drawn in and

{C O}_{2}

rich air is released out.
E. Diffusion of

O_{2}

and

{C O}_{2}

between blood and tissue.

Q. Given below is a list of different steps (i-vi) involved in respiration.
(i) Utilisation of

O_{2}

by the cells for catabolic reactions.
(ii) Transport of gases by the blood.
(iii) Pulmonary ventilation by which atmospheric air is drawn in and

C O_{2}

is released out.
(iv) Released resultant

C O_{2}

.
(v) Diffusion of

O_{2}

and

C O_{2}

between blood and tissues.
(vi) Diffusion of gases (

O_{2}

and

C O_{2}

) across alveolar tissues.
Select an option that has the correct sequence of all the steps.

Q. Given below is a list of different steps (i-vi) involved in respiration.
(i) Utilisation of

O_{2}

by the cells for catabolic reactions
(ii) Transport of gases by the blood
(iii) Pulmonary ventilation by which atmospheric air is drawn in and

C O_{2}

is released out
(iv) Release of resultant

C O_{2}

(v) Diffusion of

O_{2}

and

C O_{2}

between blood and tissues
(vi) Diffusion of gases (

O_{2}

and

C O_{2}

) across alveolar tissues.
Select an option which has correct sequence of all the steps.

Q. Arrange the given steps of respiration mechanism in the order they occur in the human body.
I. Breathing or pulmonary ventilation
II. Diffusion across the alveolar membrane
III. Transport of gases by blood
IV. Utilisation of

O_{2}

by cells
V. Diffusion of

O_{2}

and

C O_{2}

between blood and tissues

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