Vital capacity of lung is
1.IRV + ERV + TV2.IRV + ERV 
3.IRV + ERV + TV + RV4.IRV + ERV + TV - RV
Subtopic:  Respiratory System: Pulmonary Volumes & Capacities |
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Select the sequence of steps in Respiration.
A. Diffusion of gases (O2 and CO2) across alveolar membrane.
B. Diffusion of O2 and CO2 between blood and tissues
C. Transport of gases by the blood
D. Pulmonary ventilation by which atmospheric air is drawn in and CO2 rich alveolar air is released out.
E. Utilisation of O2 by the cells for catabolic reactions and resultant release of CO2

Choose the correct answer from the options given below:
1. (D), (A), (C), (B), (E) 2. (C), (B), (A), (E), (D)
3. (B), (C), (E), (D), (A) 4. (A), (C), (B), (E), (D)
Subtopic:  Respiratory System: Exchange of Gases | Respiratory System: Transport of Gases |
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Under normal physiological conditions in human being every 100 ml of oxygenated blood can deliver  _____________ml of O2 to the tissues.
1. 10 ml
2. 2 ml 
3. 5 ml
4. 4 ml

Subtopic:  Respiratory System: Exchange of Gases |
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Which of the following is not the function of conducting part of respiratory system?
 
1. Provides surface for diffusion of O2 and CO2
2. It clears inhaled air from foreign particles
3. Inhaled air is humidified
4. Temperature of inhaled air is brought to body temperature

 
Subtopic:  Respiratory System: Transport of Gases |
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Which of the following disorders represents decrease in respiratory surface due to damaged alveolar walls?
1. Hypocapnia 
2. Bronchitis 
3. Asthma 
4. Emphysema 

Subtopic:  Respiratory Disorders: Part 1 |
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In the regulation of respiration, a chemosensitive area adjacent to the rhythm centre in the medulla region of the brain, is highly sensitive to: 
1. \(HCO^-_3\)
2. \(CO_2\)
3. \(O_2\)
4. \(N_2\)

Subtopic:  Respiratory System: Regulation of Respiration |
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Which of the following statements are correct with respect to vital capacity?
 
a. It includes ERV, TV and IRV
b. Total volume of air a person can inspire after a normal expiration
c. The maximum volume of air a person can breathe in after forced expiration
d. It includes ERV, RV and IRV.
e. The maximum volume of air a person can breathe out after a forced inspiration.

Choose the most appropriate answer from the options given below:
1. (b), (d) and (e)
2. (a), (c) and (d)
3. (a), (c) and (e)
4. (a) and (e)
Subtopic:  Respiratory System: Pulmonary Volumes & Capacities |
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Identify the region of human brain which has pneumotaxic centre that alters respiratory rate by reducing the duration of inspiration.
1. Medulla
2. Pons
3. Thalamus
4. Cerebrum
Subtopic:  Respiratory System: Regulation of Respiration |
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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

Subtopic:  Respiratory System: Transport of Gases |
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Select the correct events that occur during inspiration.

a. Contraction of diaphragm

b Contraction of external inter-costal muscles

c. Pulmonary volume decreases

d.  Intra pulmonary pressure increases

1. (c) and (d)

2. (a), (b) and (d)

3. only (d)

4. (a) and (b) 

Subtopic:  Respiratory System: Pulmonary Ventilation |
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