I : Lungs : : II : Nut I. [A] Respiration [B] Air [C] Ribs [D] Breathe II. [P] Eat [Q] Shell [R] Almond [S] Oil
(a) In cockroaches, air enters the body through
(i) lungs
(ii) gills
(iii) spiracles
(iv) skin
(b) 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
(i) move outwards
(ii) move downwards
(iii) move upwards
(iv) do not move at all
Match the lung capacities in Column A with the quantities in Column B.
Column AColumn B i. Dead air spacea. 6000 mL ii. Tidal volumeb. 3500 mL iii. Inspiratory capacityc. 500 mLiv. Total lung capacityd. 150 mL
Question 14 Which of the following statement(s) is (are) true about respiration? (i) During inhalation, ribs move inward and the diaphragm is raised. (ii) In the alveoli, exchange of gases takes place i.e., oxygen from alveolar air diffuses into blood and carbon dioxide from the blood into the alveolar air. (iii) Haemoglobin has a greater affinity for carbon dioxide than oxygen. (iv) Alveoli increase surface area for exchange of gases. (a) (i) and (iv) (b) (ii) and(iii) (c) (i) and (iii) (d) (ii) and (iv)
A person suffers punctures in his chest cavity in an accident, without any damage to the lungs its effect could be
(a) reduced breathing rate
(b) rapid increase in breathing rate
(c) no change in respiration
(d) cessation of breathing