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प्रश्न
Give a reason.
Food becomes acidic in the stomach.
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उत्तर
Food becomes acidic in the stomach because of the presence of hydrochloric acid. As the food reaches the stomach, it gets mixed with the hydrochloric acid present there. The hydrochloric acid plays the following roles in digestion:
- It initiates protein digestion by activating the conversion of pepsinogen to pepsin.
- It provides an acidic medium for the activity of pepsin and other enzymes present in gastric juice.
संबंधित प्रश्न
Which part of the digestive canal is involved in:
Chewing of food ______.
Name any four life processes in living things.
Name the enzyme present in human saliva. What type of food material is digested by this enzyme?
What is the other name of food pipe?
Define holozoic nutrition.
What causes movement of food inside the alimentary canal?
How do carbohydrates get digested in human beings?
If the saliva is lacking in salivary amylase, then which of the following processes taking place in the buccal cavity will be affected?
| When a person puts food in his mouth, then teeth cut it into small pieces, chew and grind it. The glands A in the mouth secrete a substance B which is mixed with the food by tongue. The substance B contains an enzyme C which starts the digestion of food in the mouth. The slightly digested food from the mouth goes down a tube D. The special type of movements E in the walls of tube D push the food into stomach for further digestion. The stomach wall secretes gastric juice containing three substance F, G and H. One of the functions of F is to kill bacteria which may enter the stomach with food. The substance G protects the inside layer of stomach from the damaging effect of substance F whereas substance H is and enzyme for digestion. The partially digested food then enters into small intestine for further digestion. |
- What are (i) gland A, (ii) substance B, and (iii) enzyme C?
- Name the tube D.
- What is the movement E known as?
- What are (i) F, (ii) G, and (iii) H?
Name the substance whose build up in the muscles during vigorous physical exercise may cause cramps.
List in tabular form two differences between pepsin and trypsin.
Fill in the blanks.
Removal of undigested food is called ________.
Find the odd one out. Give reasons for your choice.
Differentiate between.
Mechanical digestion and Chemical digestion
Answer in detail.
Name the four types of teeth and their functions
Mention the different types of nutrition?
Mention the 3 important digestive glands in the process of digestion?
How do fats get digested in human beings?
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:
Give two reasons, why bile juice is considered to be an important secretion of liver in the process of digestion?
