Q. No.A condition in which a person's airways become inflamed, narrow, swell and produce extra mucus, which makes it difficult to breathe is known as
1.
Asthma
2.
Emphysema
3.
Chronic bronchitis
4.
Chronic obstructive pulmonary disease
During the passage of blood through a tissue with normal metabolism, the percentage of hemoglobin that unloads oxygen is approximately:
| 1. 10% | 2. 25% |
| 3. 50% | 4. 75% |
During expiration, the diaphragm and external intercostal muscles are:
1. contracted
2. relaxed
3. flexed
4. both relaxed (diaphragm) and flexed (intercostal muscles)
The part of the human brain where the main respiratory center is located is:
| 1. | pons varolii | 2. | cerebrum |
| 3. | medulla oblongata | 4. | thalamus |
The respiratory center in humans can be primarily stimulated by:
1. carbon dioxide and hydrogen ions
2. oxygen gas levels in the blood
3. oxygen gas levels in the hemoglobin
4. conscious feeling for the need for more oxygen
The peripheral chemoreceptors in carotid and aortic bodies respond to:
1. hydrogen ion concentration.
2. levels of carbon dioxide in the blood.
3. levels of oxygen in the blood.
4. all of the above
What will happern to the rate and depth of breathing when blood carbon dioxide rises?
| 1. decreases | 2. increases |
| 3. stays the same | 4. stops |
Both carbon dioxide and oxygen move across the respiratory membrane due to:
| 1. gravity | 2. blood pressure |
| 3. diffusion | 4. active transport |
With respect to the atmospheric air, the deoxygenated blood flowing into lung capillaries has a higher concentration of:
| 1. oxygen | 2. both carbon dioxide and oxygen |
| 3. carbon monoxide | 4. carbon dioxide |
Hemoglobin carrying carbon dioxide is called as:
| 1. Deoxyhemoglobin | 2. Carbaminohemoglobin |
| 3. Carboxyhemoglobin | 4. Oxyhemoglobin |
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