Advertisements
Advertisements
Question
Answer in detail.
You had eaten bread in the morning. Starting from the mouth, explain how it is digested?
Advertisements
Solution
Bread contains starch. The digestion of starch starts in the mouth. When we chew the bread, saliva gets mixed with it. It softens the food. Saliva is secreted by salivary glands. Saliva contains the enzyme salivary amylase (ptyalin) which acts on starch to convert it into maltose
starch \[\ce{->[salivary][amylase]}\] maltose.
After chewing, the food is swallowed into the pharynx. No further digestion takes place in the pharynx. From here the food moves in to the oesophagus, by peristaltic movements it is pushed in to the alimentary canal. In the small intestine (duodenum) rest of the starch is broken down into smaller units by pancreatic amylase. Further Maltose is changed into glucose by maltose in the small intestine (ileum).
APPEARS IN
RELATED QUESTIONS
Define the following term:
Kilocalorie
Why is there a difference in the rate of breathing between aquatic organisms and terrestrial organisms? Explain.
Answer the following question.
Write two different ways in which glucose is oxidized to provide energy in the human body. Write the products formed in each case.
Write the function of the following in the human alimentary canal:
HCl in stomach
Write true or false for the below statement. Rewrite the false statements correctly.
Saliva contains lipase which digests carbohydrates
Describe the human salivary gland.
The question has four options. Choose the correct answer:
Uvula can close the opening of
The exit of unabsorbed food material is regulated by ____________.
Choose the odd one:
Given below from (i) to (iv) are some food items.
- Boiled and mashed potato
- Glucose solution
- A slice of bread
- Mustard oil
Which of the above will give a blue-black colour when tested with iodine?
