1. The floor of the chest is called
A. Diaphragm
B. Pleura
C. Pleural cavity
D. Alveoli
2. Double layered thin sac covering lungs is called
A. Diaphragm
B. Pleura
C. Rib cage
D. Alveoli
3. Inspiration is due to ________and expiration is due to ________ of lungs
A. Active expansion, active contraction
B. Passive expansion, passive contraction
C. Active contraction, active expansion
D. Passive contraction, passive expansion
4. Choose the correct statement
A. Lungs are spongy
B. On contraction of diaphragm muscles, its shape become less dome like
C. Contraction of rib muscles elevates the ribs
D. All
5. During inspiration
A. Muscles of ribs relax
B. Ribs move upward and forward
C. Muscles of diaphragm relax
D. All
6. During expiration
A. Muscles of ribs relax
B. Ribs move downward and inward
C. Muscles of diaphragm relax
D. All
7. Choose the correct statement
A. Oxyhaemoglobin is bright red
B. Oxyhaemoglobin is unstable
C. Haemoglobin is purple- red
D. All
8. Maximum oxygen can be absorbed by haemoglobin at
A. 100mmHg
B. 200mmHg
C. 550mmHg
D. 760mmHg
9. At sea level normal human blood absorbs ____per 100ml of blood at its maximum.
A. 20ml
B. 30ml
C. 40ml
D. 50ml
10. By_____pressure of oxygen in lungs, haemoglobin can be completely oxygenated
A. 100mmHg
B. 200mmHg
C. 300mmHg
D. 760mmHg
11. Choose the correct statement
A. Increased CO2 tension favours liberation of O2 from blood to tissue
B. Oxygen carrying capacity of blood decreases due to rise in temperature
C. Increased blood pH increases oxygen binding ability of haemoglobin
D. All
12. Due to increased CO2 pressure, the oxygen tension
A. Increases
B. Decreases
C. Same
D. Increase severely
13. _________is more important as a regulator of normal alveolar ventilation.
A. CO2
B. O2
C. N2
D. None of them
14. Blood gets "CO2" in different states choose correct statement
A. About 20% as carboxy haemoglobin
B. About 5% with help of other plasma proteins
C. About 70% as bicarbonate ion combined with sodium in plasma
D. All are correct
15. Upon leaving the capillaries most of the carbon dioxide in the blood is in the form
A. Carboxyhaemoglobin
B. Attached with other plasma proteins
C. Bicarbonate ion
D. Corpuscles Combined with potassium
16. Arterial blood contains______where as venous blood has ____of carbon dioxide per 100ml of blood.
A. 50ml, 54ml
B. 54ml, 50ml
C. 60ml, 64ml
D. 64ml, 60ml
17. Tuberculosis is a disorder of
A. Digestive system
B. Respiratory system
C. Nervous system
D. Excretory system
18. Which of the following is respiratory disease
A. Tuberculosis
B. Asthma
C. Emphysema
D. All
19. In which of the following disorders histamines are released into circulatory system
A. Tuberculosis
B. Asthma
C. Emphysema
D. Anaemia
20. Asthma is an allergic reaction to
A. Pollen and spores
B. Cold or humidity
C. Pollution
D. All
21. ______is specifically the breakdown of small alveoli and formation of larger alveoli
A. Tuberculosis
B. Asthma
C. Emphysema
D. All
22. In man the oxygen carrying capacity of blood is increased by hemoglobin to about
A. 15 times
B. 25 times
C. 50 times
D. 75 times
23. Myoglobin is
A. Iron containing protein pigment
B. Muscle haemoglobin
C. One polypeptide chain
D. All
24. Myoglobin has ______affinity to combine with oxygen as compared to haemoglobin.
A. Higher
B. Lesser
C. No
D. Very less
25. Due to activation of diving reflex
A. Breathing stops
B. Consumption of oxygen reduces
C. Rate of heart beat slows down
D. All
26. Cetaceans can pass _____hours in depth of ocean without coming up for air.
A. 2
B. 3
C. 4
D. 5
27. Fully inflated lungs of an adult human being have total inside capacity of about
A. 5 liters
B. 10 liters
C. 15 liters
D. 20 liters
28. At rest or during sleep exchange of air is only about _____normally
A. Half litre
B. One and half litre
C. Two and half litre
D. Three and half litre
29. The volume of air exchanged during exercise is about
A. 3.5 litre
B. 4.5 litre
C. 5.5 litre
D. 6.5 litre
30. Residual volume in lungs during exercise is
A. 1.5 litre
B. 2.5 litre
C. 3.5 litre
D. 4.5 litre