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Questions
What is the role of the acid in our stomach?
State one role of the following in human digestive system:
Hydrochloric acid
Solution
- The hydrochloric acid in our stomach dissolves bits of food and creates an acidic medium. In this acidic medium, the enzyme pepsinogen is converted to pepsin, a protein-digesting enzyme.
- It also kills many bacteria and other microorganisms that enter along with the food.
- It creates an acidic environment and activates the digestive enzyme pepsin.
Notes
Students should refer to the answer according to their questions.
RELATED QUESTIONS
What is the function of enzymes in the human digestive system?
Which of the following component of our food is digested by an enzyme which is present in saliva as well as in pancreatic juice?
(a) proteins
(b) fat
(c) minerals
(d) carbohydrate
The partially digested food coming from the stomach of a person enters a long and narrow organ A in his body. The organ A receives the secretion of two glands : liver and pancreas. Liver secretes a greenish-yellow liquid B which is normally stored in the organ C. Pancreas secretes pancreatic juice which contains three digestive enzymes D, E and F. The intestinal juice completes the process of digestion of food. The inner wall of organ A has millions of tiny finger-like projections G which help in the rapid absorption of digested food into blood stream. The undigested part of food then passes into wider tube H which absorbs most of the water from undigested food. The last part of tube H called I stores this undigested food (or waste) for some time. The undigested food is then passed out though opening J as faeces in the process known as K.
(a) Name the organ A.
(b) Name (i) liquid B, and (ii) organ C.
(c) What are the digestive enzymes D, E and F?
(d) Name the projections G present on the inner wall of organ A.
(e) Name (i) tube H (ii) part I (iii) opening J, and (iv) process K.
What is the dental formula of a normal human adult?
Define the following terms :
Peristalsis
State whether the following statement is True or False.
The ducts from the salivary glands open into the duodenum.
Fill in the blanks.
Grinding of food is brought about by _______ and ______
Fill in the blanks.
______ and ______ help in digestion but food does not pass through them.
Answer in detail.
You had eaten bread in the morning. Starting from the mouth, explain how it is digested?
Define with examples: Omnivores
State one difference in nutrition: Holophylic and Holozoic
Define digestion.
Describe the digestion of food in small intestine.
Describe the following: Digestion of fat in the intestine
Correct the spellings: Carboxytipepdase
Correct the spellings: HLC
The digestive glands associated with the alimentary canal are ______.
Cellulose-rich food substances are a good source of roughage in human beings because
Read the following passage carefully and answer the questions that follow it. Bile juice is stored in a sac called, the gall bladder, located near its organ of secretion, the liver. The gall bladder releases the bile juice into the small intestine whenever food reaches there. Though bile juice is devoid of any digestive enzymes, it is required for the digestion of fats. The fats cannot be digested easily because they are insoluble in water and are present as large globules. Bile juice breaks down big fat droplets into smaller droplets. These are then easily digested by the enzymes released from the pancreas.
- Which organ secretes the bile juice?
- Why is digestion of fats difficult as compared to that of other nutrients?
- How does bile juice help in the digestion of fat?
- Where is the digestion of fat completed?
- Does bile juice digest fat completely?
Given below are two columns, Column I shows enzymes secreted by the glands in the alimentary canal of human beings and Column II indicates the components of food on which enzymes act. Choose the options showing correct matching:
