How do alveoli and capillaries help to get oxygen into your bloodstream and carbon dioxide out of your bloodstream?
2. People who have asthma sometimes have “asthma attacks”, which means their bronchioles swell up and close. Why could an asthma attack make it difficult to breathe?
3. Smoking cigarettes makes your alveoli less elastic (or “stretchy”), so they can’t expand as much. Explain why people who smoke often may have trouble breathing
4. Explain one way that the respiratory system is important to the circulatory system. (What’s one reason your circulatory system wouldn’t work without your respiratory system?)
5. Why are insectivorous plants called partial heterotrophs?
6. A goat eats away all the leaves of a small plant (balsam). However, in a few days, new leaves could be seen sprouting in the plant again. How did the plant survive without leaves?
7. Plants are considered an essential part of earth as they keep a check on lot of process occurring all over. What would happen if all the green plants are wiped from earth?
8. Nitrogen is an essential nutrient for plants growth. But farmers who cultivate pulses as crops like green gram, bengal gram, black gram, etc., do not apply nitrogenous fertilisers during t cultivation. Why?
9. What is dental plaque?What harm can it cause?How can the formation of plaque be prevented?
10.What is diarrhoea? How is it caused? How can it be prevented?
13.Name the parts of the alimentary canal where (i) water gets absorbed from undigested food. (ii) digested food gets absorbed. (iii) taste of the food is perceived. (iv) bile juice is produced.
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5) Insectivores are called partial heterotrophs because they contain chlorophyll and are capable of carrying out photosynthesis, and at the same time they capture insects for nutrition exhibiting hetero trophic nature.
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Notice that the airways are narrowed (skinny), so less air can move in and out of the lungs. When things are working normally, the amount of air we breathe in is about the same as the amount of air we breathe out. But during an asthma attack, air gets trapped inside the lungs making it harder and harder to breathe.
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