Q. No.Given below are two statements:
In light of the above statements, choose the correct option:
| Assertion (A): | Gaseous exchange in mammals occurs in alveoli, air sacs clustered at the tips of the finest bronchioles. |
| Reason (R): | The type of epithelial layer of serous membranes such as the pleura is the same as that found in alveoli. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | (A) is false but (R) is true. |
Subtopic: Â Respiratory System: Exchange of Gases |
Level 3: 35%-60%
Hints
How many of the given factors affect the exchange of gases between blood and tissues?
Mark the correct option from the following:
| a. | Thickness of diffusion membrane | b. | Solubility of gases |
| c. | Pressure gradient | d. | Concentration gradient |
| 1. | Two | 2. | One |
| 3. | Four | 4. | Zero |
Subtopic: Â Respiratory System: Exchange of Gases |
 79%
Level 2: 60%+
Hints
Read the following statements and select the correct option
| Statement A: | Alveoli are the primary sites of exchange of gases which consist of single thin layer of flattened cells with irregular boundaries |
| Statement B: | Thin, permeable of gases, moist and least vascular are come of the characters of a typical respiratory surface |
| 1. | Both statements (A) and (B) are correct |
| 2. | Both statements (A) and (B) are incorrect |
| 3. | Only statement (A) is correct |
| 4. | Only statement (A) is incorrect |
Subtopic: Â Respiratory System: Exchange of Gases |
 51%
Level 3: 35%-60%
Hints
Consider the given two statements
| Assertion (A): | Oxygen has to be continuously provided to the cells and CO2 has to be released from the cell. |
| Reason (R): | CO2 is produced as a result of catabolic reactions in a cell. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A) |
| 2. | Both (A) and (R) are True but (R) does not correctly explains (A) |
| 3. | (A) is True but (R) is False |
| 4. | Both (A) and (R) are False |
Subtopic: Â Respiratory System: Exchange of Gases |
 57%
Level 3: 35%-60%
Hints
| Assertion (A): | The thickness of the diffusion membrane is nearby a centimeter. |
| Reason (R): | The thickness of the diffusion membrane facilitates gaseous exchange. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true, but (R) is not the correct explanation of (A). |
| 3. | (A) is true, but (R) is false. |
| 4. | (A) is false, but (R) is true. |
Subtopic: Â Respiratory System: Exchange of Gases |
 82%
Level 1: 80%+
Hints
Given below are two statements:
| Assertion (A): | At high altitudes, hypoxia may occur. |
| Reason (R): | The percentage of O2 decreases in the air at high altitudes. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Â Respiratory System: Exchange of Gases |
 88%
Level 1: 80%+
Hints
| Assertion (A): | Alveoli are the major site of exchange of gases. |
| Reason (R): | CO2 and O2 are exchanged at alveoli by simple diffusion. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Â Respiratory System: Trachea & Basic Anatomy of Lung |Â Respiratory System: Exchange of Gases |
 50%
Level 3: 35%-60%
Hints
Given below are two statements:
| Assertion (A): | Inspiration occurs when intra-pulmonary pressure is lower than atmospheric pressure. |
| Reason (R): | Inspiration is initiated by the relaxation of diaphragm and intercostal muscles. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Â Respiratory System: Exchange of Gases |
 87%
Level 1: 80%+
Hints
| Assertion (A): | The value of tidal volume in a healthy human is about 6000-8000 mL/min. |
| Reason (R): | The volume of air remaining in the lungs even after forcible expiration is 1100-1200 mL. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Â Respiratory System: Pulmonary Volumes & Capacities |Â Respiratory System: Exchange of Gases |
 79%
Level 2: 60%+
Hints
Given below are two statements:
| Assertion (A): | \(O_2\) binds with Hb in an irreversible manner. |
| Reason (R): | \(CO_2\) combines with Hb both is an irreversible and reversible manner. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Â Respiratory System: Exchange of Gases |Â Respiratory System: Transport of Gases Part 1 |Â Respiratory System: Transport of Gases Part 2 |Â Respiratory System: Transport of Gases |
 74%
Level 2: 60%+
Hints
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