Question

Exercises 1. Why does an athlete breathe faster and deeper than usual after finishing the race? 2. Last the similarities and differences between aerobte and anaeroble respiration 3. Why do we often sneeze when we inhale a lot of dust-laden air? X 4. Take three test-tubes. Full Kath of each with water. Label them A, B and c. Keep a snail in test-tube A, a water plant in test-tube B and in c. keep snail and plant both. Which test-tube would have the highest concentration of CO,? 5. Tick the correct answer: (a) In cockroaches, air enters the body through (1) lungs (ii) gills (ii) spiracles (iv) skin During heavy exercise, we get cramps in the legs due to the accumulation of (i) carbon dioxide (ii) lactic acid (iii) alcohol (iv) water (c) Normal range of breathing rate per minute in an average adult person at rest is: (i) 9-12 (ii) 15-18 (iii) 21-24 (iv) 30-33 (d) During exhalation, the ribs (1) move outwards (ii) move downwards (iii) move upwards (iv) do not move at all 6. Match the items in Column I with those in Column II: (b) Column I Column II (a) Yeast (i) Earthworm (b) Diaphragm (ii) Gills (c) Skin (iii) Alcohol (d) Leaves (e) Fish (iv) Chest cavity (v) Stomata (vi) Lungs and skin (vii) Tracheae (f) Frog​

Answer 1

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