breathing and respiration

The covering of lung is called

• Pericardium

• Pleural membrane

• Peritoneum

• Perichondrium

Conducting Part of respiratory system in Humans extends from the:

• External Nostrils up to tertiary bronchi

• External nostrils up to terminal bronchioles

• Primary bronchi up to tertiary bronchi

• trachea up to secondary bronchi

WHICH OF THE FOLLWING IS CORRECT SEQUENCE OF STEPS IN RESPIRATION

a- utilization of O2 by body cells, b- transport of gases by blood up to tissues, c- pulmonary ventilation , d- diffusion of gases at alveolar surface , e- exchange of gases between blood and tissues

• d-b-e-a-c

• c-d-b-e-a

• d-e-b-c-a

• c-e-b-d-a

WHICH OF THE FOLLOWING STEP IS NOT INVOLVED IN RESPIRATION?

• diffusion of gases across alveolar membrane

• transport of gases by blood

• provide nutrients and O2 to all living cells of body

• utilization of O2 y cells for catabolic reaction sand resultant release of co2

How the majority of oxygen gets transported?

• In dissolved form in blood plasma

• In form of oxyhaemoglobin

• in form of methaemoglobin

• in form of carbmino haemoglobin

One molecule of Haemoglobin carries how many oxygen molecules?

• 1

• 2

• 3

• 4

Factors favourable for formation of Oxyhaemoglobin are

• Low pO2 and high pCO2

• Less H+ conc and low temp

• Low pO2and low temp

• Low pO2 and high pCO2

When pCO2 is high and pO2is low as in the tissues, binding of carbon dioxide

• increases

• decreases

• remains unchanged

• first increases then dereases

Dissociation of carbon dioxide from carbamino- haemoglobin takes place when

• pCO2 is low and pO2 is high in alveoli

• pCO2 is low and pO2 is high in tissues

• pCo2 is high and pO2 is high in alveoli

• pCO2 is high and pO2 is low in alveoli

Amount of O2 and CO2 delivered by 100ml oxygenated blood to tissues and 100 ml deoxygenated blood to alveoli respectively is

• 10 ml, 4 ml

• 5ml, 8 ml

• 5 ml, 4 ml

• 1ml, 5 ml