a) Name the enzyme present in Saliva. Why is it important ?
(b) What is emulsification ?
(c) Name the substance that is oxidized in the body during respiration.
(d) Why are lungs divided into very small sac-like structures ?
CBSE Class X Science LA (5 Marks)
Answers
(a) Salivary amylase enzyme is present in saliva.
It is important because it breaks down starch to give sugar.
(b) Emulsification is the process in which there is a break-down of large fat globules to smaller globules.
(c) Glucose is the substance that is oxidized in the body during respiration.
(d) Lungs are divided into very small sac-like structures to increase the surface area for exchange of gases.Answer:
(a) Salivary amylase enzyme is present in saliva.
It is important because it breaks down starch to give sugar.
(b) Emulsification is the process in which there is a break-down of large fat globules to smaller globules.
(c) Glucose is the substance that is oxidized in the body during respiration.
(d) Lungs are divided into very small sac-like structures to increase the surface area for exchange of gases.