Respiratory System Exchange Of Gases
High-Yield Trend
Questions 6 MCQs
1. has a lower affinity for oxygen than that of the adult
2. its affinity for oxygen is the same as stat of an adult
3. has only 2 protein subunits instead of 4
4. has a higher affinity for oxygen than that of an adult.
The figure given below shows a small part of the human lung where exchange of gases takes place. In which one of the options given below, the one part A, B, C or D is correctly identified along with its function?
| 1. | A – Alveolar cavity – main site of exchange of respiratory gases |
| 2. | D – Capillary wall – exchange of O2 and CO2 takes place here |
| 3. | B – Red blood cell – transport of CO2 mainly. |
| 4. | C – Arterial capillary – passes oxygen to tissues |
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
Match the following columns and select the correct option:
| Column-I | Column-II | ||
| (a) | Pneumotaxic Centre | (i) | Alveoli |
| (b) | O2 Dissociation curve | (ii) | Pons region of the brain |
| (c) | Carbonic Anhydrase | (iii) | Haemoglobin |
| (d) | Primary site of exchange of gases | (iv) | R.B.C. |
| Options: | (a) | (b) | (c) | (d) |
| 1. | (i) | (iii) | (ii) | (iv) |
| 2. | (ii) | (iii) | (iv) | (i) |
| 3. | (iii) | (ii) | (iv) | (i) |
| 4. | (iv) | (i) | (iii) | (ii) |
The partial pressures (in mm Hg) of oxygen (O2) and carbon dioxide (CO2) at alveoli (the site of diffusion) are :
1. pO2 = 95 and pCO2 = 40
2. pO2 = 159 and pCO2 = 0.3
3. pO2 = 104 and pCO2 = 40
4. pO2 = 40 and pCO2 = 45
Select the favorable conditions required for the formation of oxyhemoglobin at the alveoli.
1. High pO2, high pCO2, less H+, higher temperature
2. Low pO2, low pCO2, more H+, higher temperature
3. High pO2, low pCO2, less H+, lower temperature
4. Low pO2 high pCO2 more H+, higher temperature
Preparing Respiratory System Exchange Of Gases for NEET
Respiratory System Exchange Of Gases is a specific sub-topic that frequently appears in the NEET examination. Understanding the underlying principles and practicing targeted questions is key to mastering this concept.
The questions compiled above are previous year questions (PYQs) directly related to Respiratory System Exchange Of Gases. Practicing these specific questions helps you understand the difficulty level and the examiner's approach to this topic.
Topic Frequently Asked Questions
Is Respiratory System Exchange Of Gases a high-weightage topic?
You can refer to the priority and consistency badges at the top of this page. High priority topics should be thoroughly revised multiple times before the exam.
Should I memorize the solutions?
No, it is highly recommended to understand the core concept and methodology behind each solution rather than memorizing them, as exact questions are rarely repeated, but the concepts definitely are.