Question

1. What are the properties which makes a respiratory organ efficient in
multicellular organisms?

2. The affinity of Hb for oxygen and carbondioxide is almost the same.
However, in our body Hb majorly binds to oxygen and transports it
to the tissues. State two reasons.

3. The movement of muscles is very important in the process of digestion. Justify the statement.

4. ‘Different organisms have different types of nutritional processes’ Why?

5. Respiration is a cumulative effect of various chemical reactions in (2) the body. Justify the statement.

Answer 1

Answer:

3. is an important process that breaks down the proteins, fats, carbohydrates, vitamins, minerals into simpler forms so that it can be absorbed easily into the body cells. During this process, proteins are converted into amino acids, carbohydrates are converted into simple sugars and fats are broken down into fatty acids and glycerol.

Many digestive enzymes and hormones act on food, at various stages during the process of digestion. The whole process occurs in a sequential manner