Answer Briefly
1. Why do we require oxygen?
2. Is breathing the same as respiration?
3. Why does an athlete breathe faster after finishing a race?
4. Mention the end products of respiration.
5. Why do we sneeze when we inhale dust-laden air?
6. Select the odd one out giving reasons:
(a) yeast, anaerobic respiration, glucose, oxygen
(b) breathing, cellular respiration, aerobe, anaerobe
(c) inhalation, exhalation, ribs moving upwards, diaphragm moving down
(d) spiracles, tracheae, cockroach, earthworm
Answers
Answered by
5
Answer:
1) oxygen is the only air we can breathe without oxygen we cannot breathe and we will die
Answered by
8
Answer:
1 we require oxygen to live and grow
2 breathing and respiration are different because breathing is inhale and exhale whereas respiration occurs when blood comes to lungs to exchange carbon dioxide with oxygen
3 athlete breath faster because when he runs his heart starts pumping the blood faster because of that his body uses more oxygen than normal
4 the end product is carbon dioxide
5 we sneeze because it's an response to stimuli when dust laden enters our nose our body tries to kick it out
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