Breathing Fun

Given , Total Lung capacity is 6000 ml. Inspiratory capacity = 3000 ml, Find the value of FRC ?

• More than 3 L

• 2.5 L -3 L

• less than 2.5 ml

• 3 L

A -Trachea is a straight tube extending up to the late-thoracic cavity, which divides at the level of 5th thoracic vertebra.

B -The area from trachea to terminal bronchioles are supported by incomplete cartilaginous rings.

• Both A and B are correct

• Both A and B are incorrect

• A is correct but R is incorrect

• A is incorrect but R is correct

Inspiration can occur if -

• there is a negative pressure in the lungs with respect to atmospheric pressure

• there is a positive pressure in the lungs with respect to atmospheric pressure

• there is an equal pressure in the lungs with respect to atmospheric pressure

• none of these

Arrange the following steps of Respiration from Final to initial stage .

(i) Transport of gases by the blood.

(ii) Utilisation of O2 by the cells for catabolic reactions and resultant release of CO2

(iii) Breathing or pulmonary ventilation by which atmospheric air is drawn in and CO2 rich alveolar air is released out.

(iv)Diffusion of gases (O2 and CO2 ) across alveolar membrane.

(v) Diffusion of O2 and CO2 between blood and tissues.

• (iii)-(i)-(iv)- (ii)-(v)

• (iii)-(iv)-(i)- (v)-(ii)

• (iii)-(v)-(ii)- (iv)-(i)

• (ii)-(v)-(i)- (iv)-(iii)

Question -

• (a)

• (b)

• (c)

• (d)

1 - O2 can bind with haemoglobin in an irreversible manner to form oxyhaemoglobin.

2- CO2 is carried by haemoglobin as carbamino-haemoglobin (about 20-25 per cent).

3- Binding of oxygen with haemoglobin is primarily related to partial pressure of O2 .

4 - Neural signal from Pneumotaxic centre can increase the duration of inspiration .

• All are correct

• 2 are correct

• 3 are correct

• 1 is correct

Which one of the following is not correct regarding Thoracic chamber ?

• It is an air tight chamber

• It is formed dorsally by Vertebral column.

• It is formed ventrally by Vertebral column

• formed by Diaphragm on lower side

Statement I - Conducting part starts from external nostrils to terminal bronchioles.

Statement II- Respiratory part starts from larynx to alveoli.

• Both Statement are correct

• Both Statement are incorrect

• Statement I is correct only

• Statement II is correct only

Regarding the function of conducting system, mark the wrong entry?

• Brings the air to body temperature

• Warms up the air

• Diffusion of gases

• Cleans up the air

Which of the following changes occur in diaphragm and intercostal muscles when expiration of air takes place?

• External intercostal muscle relax and diaphragm contracts

• External intercostal muscles contracts and diaphragm relaxes

• External intercostal muscles and diaphragm relax

• External intercostal muscles and diaphragm contract