Question

Tick the correct answer:

(a) In cockroaches, air enters the body through

(i) lungs



gills



(iii) spiracles

(iv) skin

(b) During heavy exercise, we get cramps in the legs due to the accumulation of

(i) carbon dioxide



lactic acid





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

Answer 1

"a) In cockroaches, air enters their body by the spiracles of the body of the cockroaches

b) During the heavy crunches, we get cramps in the leg due to the accumulation of the lactic acid formation in our body.

c) The normal range of breathing rate per minute in an average adult person at rest is 15-18.

d) During the exhalation, our ribs move downwards.

"

Answer 2

Cockroaches air enter the body thorough spiracles