In alveoli,

(1)pCO₂ is high and pO₂is low

(2)pCO₂ is low and pO₂ is high

(3)pCO₂ is low and pO₂ low

(4)None of the above

The formation of Carbonic acid from Carbon dioxide and water is catalysed the enzyme

(1)Carbonic anhydrase

(2)Carbonic anhydride

(3)Carbonic hydrase

(4)Both A and C

At tissue sites, partial pressure of CO_2­ is high due to_______ process.

(1)Anabolic

(2)catabolic

(3)Both A and B

(4)Oxidative

Carbonic anhydrase is present in

(1)R.B.C

(2)Plasma

(3)Both A and B

(4)Tissues

The CO_2­ is trapped in the form of ___________ at the tissue level.

(1)Bicarbonate

(2)Carbonate

(3)Both

(4) CO_2­

Which of the following helps in regulation the respiratory rhythm

(1)Respiratory rhythm centre

(2)Pneumotaxic centre

(3)Aortic arch and carotid artery receptors

(4)All of the above

The respiratory centre is highly sensitive for

(1)CO_2­

(2)O_2­

(3)H⁺ ions

(4)Both A and C

The respiratory centre is highly insensitive for

(1)CO_2­

(2)O_2­

(3)H⁺ ions

(4)Both A and C

Aortic arch and carotid artery receptors cannot recognise changes in

(1)CO_2­ Concentration

(2)O_2­ Concentration

(3)H⁺ ions Concentration

(4)All of these

Pneumotaxic Centre is present in the

(1)forebrain

(2)midbrain

(3)Hindbrain

(4)Diencephalon