The amount of air that enters the lungs during normal, restful breathing is called the______.

1. Vital capacity

2. Tidal volume

3. Total lung capacity

4. Expiratory reserve volume 

Every 2000 mL of deoxygenated blood delivers approximately, how much mL CO${}_2$ to alveoli?

1. 4 mL

2. 4.2 mL

3. 8 mL

4. 80 mL

By the contraction in radial muscle of diaphragm it become flattened in shape, so, volume of thoracic cavity increases in :-

1. Anterior-posterior axis

2. Dorsal-ventral axis

3. Anterior-lateral axis

4. Dorsal-lateral axis

Read the following steps and arrange them in correct sequence for the process of inspiration:

A. Increases thoracic volume

B. Air moves into lungs

C. The contraction in diaphragm and EICM

D. Increases pulmonary volume

E. Lungs expand

F. Decreases the pulmonary pressure (IPP)

1. A, B, C, D, E, F

2. C, D, A, E, F, B

3. C, A, E, D, F, B

4. C, E, D, A, F, B

Pneumotaxic centre is located in:

1. Pons

2. Cerebrum

3. Medulla oblongata

4. Thalamus

'Chemosensitive Area' for regulation of respiration is present on ?

1. Medulla

2. Pons

3. Cerebrum

4. Cerebellum

Why the partial pressure of ${\mathrm{CO}}_2$ is high at tissue-site?

1. Due to the saturation of ${\mathrm{O}}_2$ with Hb

2. Release of ${\mathrm{H}}^{+}$ at the tissue site

3. Due to metabolism

4. Due to the dissociation of ${\mathrm{HbO}}_2$

Vital capacity (VC) can be stated as 

1. TV + IRV

2. TV + FRC

3. IRV + FRC

4. IC + ERV

How many of the following statements are correct?

a. Normal exhalation during quiet breathing in an active process involving intensive muscle contraction.

b. Air flow during breathing is due to pressure gradient between the lungs and atmospheric air. 

c. A specialised centre present in the medulla region of the brain called respiratory rhythm centre is primarily responsible for regulation of respiration,

d. Respiratory rate decreases during fever.

1. One

2. Two

3. Three

4. Four 

Which of the following statement is incorrect with respect to transport of carbon dioxide in blood?