Advertisements
Advertisements
Question
Give a reason.
Food becomes acidic in the stomach.
Advertisements
Solution
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.
RELATED QUESTIONS
Name the enzyme present in human saliva. What type of food material is digested by this enzyme?
What is the name of tiny projections on the inner surface of small intestine which help in absorbing the digested food?
| When a person eats sugary food, then organisms A present in his mouth act on sugar to produce a substance B. The substance B first dissolves the calcium salts from the top part C of the tooth and then from its middle part D forming holes E. These holes ultimately reach the part F in the lower part of tooth which contains nerves and blood vessels. The substance B irritates the nerve endings inside the tooth causing toothache. |
- What are (i) organisms A, and (ii) substance B?
- What are (i) part C, and (ii) part D, of tooth known as?
- By what name are the holes E in the tooth known?
- Name the part F of the tooth.
- What will happen if organisms A reach part F of the tooth known?
What is the dental formula of a normal human adult?
Study the diagram given below and then answer the question that follows:
Identify the tooth and give a reason to support your answer.
Study the diagram given below and then answer the question that follows:
Give the total number of the type of tooth mentioned in '1' above, in the mouth of an adult and state its function.
Answer in detail.
What changes occur in food in the mouth?
Mention the different types of nutrition?
State one difference in nutrition: Holophylic and Holozoic
State whether the following statements are True or false: Trypsin coagulates the milk protein.
The question has four options. Choose the correct answer:
The vermiform appendix is a constituent of
Who is telling a lie?
Tongue: My taste-buds can tell only a sweet taste.
Who is telling a lie?
Appendix: Digestion is impossible without me.
Circle the odd one.
The common bile duct and pancreatic form ______.
Identify which three of the following terminologies is true for human dentition.
Select the correct pair of peptide hormones secreted by the alimentary canal.
The contraction and expansion movement of the walls of the food pipe is called ____________.
In which part of the alimentary canal food is finally digested?
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:
