Exchange of Gases

Q.

The exchange of gases between the alveoli and blood in the lungs, as well as between blood and tissue, depends on

1. partial pressure of the gases

2. pressure and the diffusion capacity of the gases

3. pressure of the gases

4. diffusion capacity of the gases

Q.

How many ATP molecules are produced in the Krebs cycle?

1. Glucose is converted in CO₂

2. ADP is converted to ATP

3. Pyruvic acid is converted to CO₂

4. Pyruvic acid is converted to ATP

Q.

Air moves out of the lungs when the pressure inside the lungs is ___.

1. greater than the pressure in the atmosphere

2. greater than the intra-alveolar pressure

3. less than the pressure in the atmosphere

4. equal to the pressure in the atmosphere

Q.

Which of these explain(s) the diffusion of oxygen from alveoli to blood?

1. Low concentration of oxygen in the blood.

2. Low concentration of oxygen in the alveoli.

3. High concentration of oxygen in the alveoli.

4. High concentration of oxygen in the blood.

Q.

Gas is exchanged in the alveoli by a process of _____.

1. Simple diffusion

2. Active transport

3. Facilitated diffusion

4. Filtration

Q.

During inspiration, the concentration of oxygen inside the alveoli is_______ that in blood capillaries.

1. less than

2. more or less than

3. more than

4. same as

Q.

Which of these gases are mostly transported by binding to hemoglobin?

1. Carbon dioxide
2. Carbon monoxide
3. Nitrogen
4. Oxygen

Q. In the respiratory system, rings of cartilage are found in .

1. lungs
2. alveoli
3. trachea
4. diaphragm

Q. Inorder to hold their breath for a long time, free divers hyperventilate to decrease $C{O}_2$ level in blood.

1. True
2. False

Q. The main organs responsible for respiration are:

1. Stomach
2. Lungs
3. Trachea
4. Pharynx
5. Alveoli
6. Capillaries
7. Intestines
8. Bronchi