Which of the following is entirely made of cartilage?

1. Nasal septum

2. Larynx

3. Glottis

4. Trachea

Trachea divides into two right and left primary bronchi at the level of:

1. Seventh cervical vertebra

2. Third thoracic vertebra

3. Fifth thoracic vertebra

4. Seventh thoracic vertebra

The partial pressure of oxygen is equal in

1. Atmospheric air and Alveoli

2. Alveoli and Oxygenated blood

3. Alveoli and Deoxygenated blood

4. Deoxygenated blood and Tissues

The solubility of carbon dioxide is about _____ times higher than that of oxygen across the respiratory membrane.

1. 20-25

2. 25-50

3. 125-150

4. 200-250

What amount of carbon dioxide is delivered by every 100 ml of deoxygenated blood to the alveoli?

1. 4 ml

2. 5 ml

3. 15 ml

4. 20 ml

A center that moderates the functions of the respiratory rhythm center is located in:

1. Dorsal medulla oblongata

2. Ventral medulla oblongata

3. Pons Varolii

4. Pre-central gyrus of the cerebrum

Pneumotaxic centre which can moderate the functions of the respiratory rhythm centre is present at:

1. Pons region of brain

2. Thalamus

3. Spinal cord

4. Right cerebral hemisphere

The following statements refer to gas carriage by blood. Choose the correct statement:

In the given diagram of the oxygen dissociation curve, under normal physiological conditions, the partial pressure of oxygen at the tissue level is represented by :

1. A

2. B

3. C

4. D

The partial pressure of oxygen in the alveoli of the lungs is  

1. equal to that in the blood

2. more than that in the blood

3. less than that in the blood

4. less than that of carbon dioxide