Total volume of air accommodated in the lungs at the end of maximum forceful inspiration includes
A. ERV + RV
B. IRV + ERV
C. TV + IRV + ERV + RV
D. VC + RV
1. A only
2. A & B only
3. C only
4. C & D only
What percentage of haemoglobin is saturated with oxygen in the blood at 30 mm Hg and 40 mm Hg ?
1. 50 %
2. 85 %
3. 90 %
4. 98 %
Which of the following statements is correct regarding transport in blood ?
1. 100 ml of oxygenated blood carries 53 ml of
2. 100 ml of blood always transport equal amounts of
3. 100 ml of oxygenated blood delivers more than to the tissues
4. are both maximally transported through the blood plasma
Given below are the partial pressures (in mmHg) of oxygen and carbondioxide at different parts involved in diffusion in comparison to those in atmosphere.
Respiratory gas | O2 | CO2 |
Atmospheric air | 159 | A |
Alveoli | B | 40 |
Body (deoxygenated) | 40 | C |
Blood (Oxygenated) | D | 40 |
Tissues | 40 | 45 |
Choose the correct option with respect to the values of partial pressures (in mmHg) marked as A, B, C and D
|
A |
B |
C |
D |
1. |
0.3 |
104 |
40 |
52 |
2. |
32 |
116 |
45 |
45 |
3. |
0.3 |
104 |
45 |
95 |
4. |
32 |
116 |
45 |
95 |
At 40 mmHg of partial pressure of oxygen haemoglobin is ______ saturated
1. 50 %
2. 75 %
3. 85 %
4. 35 %
Carbon dioxide generated in the tissue is carried in venous blood primarily as
1. Dissolved gas in plasma
2. Carbamino hemoglobin
3. Sodium bicarbonate in venous blood
4. Potassium bicarbonate in venous blood
Given below are four statements A-D each with one or two blanks. Select the option which correctly fills up the blanks in two statements.
A. Healthy man can inspire or expire approximately ml of air per minute.
B. Inspiratory reserve volume average ml.
C. Residual volume averages ml.
D. Volume of air accumulated in the lungs at the end of forced inspiration is .
Options :
1. A - (i) 500 ml,
B - (i) 2500 to 3000 ml
2. B - (i) 2500 to 3000 ml,
C - (i) 1000 ml to 1100 ml
3. C - (i) 1000 ml to 1100 ml
D - (i) Vital capacity
4. A - (i) 6000 to 8000 ml
D - (i) Vital capacity + residual volume
Which of the following statement is incorrect with respect to transport of carbon dioxide in blood?
1. | About 20-25 percent of carbon dioxide is carried by haemoglobin in the form of carbamino haemoglobin |
2. | 70 percent of CO is carried in a dissolved states through plasma |
3. | As the blood picks up carbon dioxide from tissue, HCO accumulates inside RBCs of which some move out into the blood plasma and in exchange chloride ions move from plasma into RBCs |
4. | The greatest percentage of carbon dioxide is transported in blood plasma as bicarbonate ions |
How many of the following statements are correct?
a. Normal exhalation during quiet breathing in an active process involving intensive muscle contraction.
b. Air flow during breathing is due to pressure gradient between the lungs and atmospheric air.
c. A specialised centre present in the medulla region of the brain called respiratory rhythm centre is primarily responsible for regulation of respiration,
d. Respiratory rate decreases during fever.
1. One
2. Two
3. Three
4. Four
Vital capacity (VC) can be stated as
1. TV + IRV
2. TV + FRC
3. IRV + FRC
4. IC + ERV