Tiêu đề 17. BREATHING AND EXCHANGE OF GASES.pdf ✅

17. BREATHING AND EXCHANGE OF GASES 1. Which one of the following has the smallest diameter (a) Right primary bronchus (b) Left primary bronchus (c) Trachea (d) Respiratory bronchiole 2. Oxygen in lungs ultimately reaches in (a) Alveoli (b) Trachea (c) Bronchus (d) Bronchioles 3. Respiratory pigment in cockroach is (a) Haemozoin (b) Haemocyanin (c) Haemoglobin (d) Absent 4. In which of the following animals, respiration occurs without any respiratory organ (a) Fish (b) Frog (c) Cockroach (d) Earthworm 5. Which of the following is a respiratory organ of scorpion (a) Gill (b) Lung (c) Ctenidia (d) Book lung 6. During forced expiration, actively contracting muscles include the (a) Diaphragm (b) External intercostals (c) Abdominal muscles (d) Diaphragm and intestinal muscle 7. In which part gaseous exchange take place in rabbit (a) Trachea & alveolar duct (b) Trachea & bronchi (c) Alveolar duct & alveoli (d) Alveoli & tissues 8. Difference between trachea and fallopian tube is (a) Trachea is related with respiration where as fallopian tube is related with reproduction (b) Trachea is related with respiration and fallopian tube with excretion (c) Trachea is related with reproduction and fallopian tube with excretion (d) Trachea is related with reproduction and fallopian tube with respiration 9. Vocal cords are situated at (a) Pharynx (b) Larynx (c) Glottis (d) Bronchial tube 10. Carbon dioxide is transported via blood to lungs mostly (a) As carbamino haemoglobin and as carbonic acid (b) In the form of carbonic acid only (c) In combination with haemoglobin only (d) Dissolved in blood plasma 11. Which is a common passage in swallowing food and breathing (a) Larynx (b) Gullet (c) Glottis (d) Pharynx 12. In the terminal bronchiole which of the following is present (a) Mucous cells

(d) None 25. The largest quantity of air that can be expired after a maximum inspiratory effort is (a) Residual volume (b) Tidal volume (c) Vital capacity of lung (d) Lung volume 26. The relative proportion between the volume of released and absorbed inrespiration is termed as (a) Respiratory exchange (b) Respiratory quotient (c) Respiratory phase (d) None of the above 27. Maximum expiratory volume is (a) 100 ml (b) 1000 ml (c) 1500 ml (d) 3000 ml 28. The vital capacity of lung is equal to (a) 4000 ml (b) 2200 ml (c) 1100 ml (d) 500 ml 29. Respiratory quotient (R.Q) is (a) (b) (c) (d) 30. The area of inner surface of bronchiole is (a) 1 m2 (b) 10 m2 (c) 100 m2 (d) 1000 m2 31. Capacity of human lung for air (a) 3000 ml (b) 1500 ml (c) 1000 ml (d) 500 ml 32. Oxy-haemoglobin dissociates into oxygen and deoxy-haemoglobin at (a) Low pressure in tissue (b) High pressure in tissue (c) Equal pressure inside and outside tissue (d) All times irrespective of pressure 33. In lungs, the air is separated from the venous blood through (a) Squamous epithelium + endothelium of blood vessel (b) Squamous epithelium + tunica media blood vessel (c) Transitional epithelium + tunica external blood vessel (d) None of these 34. The exchange of gases in the alveoli of the lungs takes place by (a) Osmosis (b) Simple diffusion (c) Passive transport (d) Active transport 35. Which of the following enzymes is absent in mitochondria (a) Aconitase (b) Maleic dehydrogenase (c) Hexokinase (d) None of these CO2 O2 2 2 O CO 2 2 CO O 2 2 CO N 2 2 N CO O2 O2 O2 O2