Question

Answer the following in a sentence

1.What does a breath mean?

2.What forms the floor of the chest cavity?

3.Why do mountaineers carry oxygen with them?

4.Why do we get muscle cramps after a heavy exercise?

5.Why are yeast used to make wine and beer?

6.Why do we feel hungry after a physical activity?

7. When we are in hilly places in the winter season the air we breathe out looks like smoke. Give reason

8. What is the difference between pores present in insects and leaves of a plant?

9. The amount of nitrogen gas remains the same in inhaled and exhaled air. Justify

10.People suffering from anemia have symptoms of tiredness. Why?

Answer 1

Answer:

1 TO BREATHE AIR INTO AND OUT OF LUNGS

2 THE DIAPHRAGM FORMS THE FLOOR OF THE CHEST CAVITY

3 BECAUSE ON HEIGHT LEVEL THERE IS LESSER AMOUNT OF OXYGEN PRESENT

4 BECAUSE OF THE ACCUMULATION OF LACTIC ACID IN MUSCLES

5 YEAST CELLS CONVERTS GLUCOSE INTO ETHYL ALCOHOL

6 BECAUSE DURING PHYSICAL ACTIVITY MORE ENERY IS REALSED