(a) Write the function of the following in the human alimentary canal :(i) Saliva(ii) HCl in the stomach(iii) Bile juice(iv) Villi(b) Write one function of each of the following enzymes :(i) Pepsin(ii) Lipase
(a)
(i) Saliva: An enzyme in saliva called amylase begins to break down into maltose sugar.
(ii) HCl in the stomach: The main function of hydrochloric acid in food is to kill bacteria that may enter the stomach with food. It also helps in creating the acidic environment or acidic pH required for the activation of inactive pepsinogen.
(iii) Bile juice: It performs two major functions: It makes the acidic food coming from the stomach alkaline so that the pancreatic enzymes can act on it. Also, the bile salts break down the fats present in the food into small globules making it easy for the enzymes to act and digest them.
(iv) Villi: Absorption of digested food occurs mainly in the small intestine because it consists of many finger-like projections called villi that are supplied with numerous blood vessels. They provide a large surface area for the absorption of food.
(b)
(i) Pepsin: Pepsin helps in the digestion of proteins into amino acids.
(ii) Lipase: It is an enzyme that acts on emulsified fats (lipids) into digestible form.
Related Articles
- Write down all the factors of the following: (i) 20 (ii) 36 (iii) 60 iv) 75
- Write one example for each of the following type of motion.$(i)$. Rectilinear$(ii)$. Circular$(iii)$. Periodic$(iv)$. Circular and periodic
- Which of the following are compounds?(i) CO (ii) No(iii) NO (iv) Co(a) (i) and (ii)(b) (ii) and (iii)(c) (i) and (iii)(d) (ii) and (iv)
- (a) What is common for Cuscuta, ticks and leeches?(b) Name the substances on which the following enzymes act in the human digestive system: (i) Trypsin (ii) Amylase (iii) Pepsin (iv) Lipase(c) Why does absorption of digested food occur mainly in the small intestine?
- With which human organ systems (or human systems) are the following associated ?(i) vena cava (ii) glomerulus (iii) alveoli (iv) villi
- Write the IUPAC name of the following :(i) CH3COCH3 (ii) CH3COCH2CH3
- Write the molecular formula of the following:(i) Hexane (ii) Benzene
- Write the following decimal numbers in the expanded form:$(i)$. 20.03$(ii)$. 2.03$(iii)$. 200.03 $(iv)$. 2.034
- Which one of the following depicts the correct representation of the atomic radius(r) of an atom?(i) and (ii)(ii) and (iii)(iii) and (iv)(i) and (iv)"
- The inner lining of stomach is protected by one of the following from the harmful effect of hydrochloric acid. This is:(a) pepsin (b) mucus (c) saliva (d) bile
- Write main functions of the following:(i) Sensory Neuron(ii) Cranium(iii) Vertebral column(iv) Motor neuron
- Write the number of covalent bonds in the following molecules:(i) Ethane (ii) Propane (iii) Hexane (iv) Pentane (v) Butane
- Which of the following are also considered to be the states of matter?(i) Plasma (ii) Platelets(iii) BEC (iv) BHC(a) (i) and (ii)(b) (ii) and (iii)(c) (i) and (iii)(d) (ii) and (iv)
- (a) Give the name and structural formula of one member each of the following:(i) alkane ; (ii) alkene ; (iii) alkyne ; (iv) cycloalkane. (b) Give the common name of (i) ethyne, and (ii) ethene. (c) Write the molecular formula and structure of benzene.
- Write the following numbers in the expanded forms:$(i)$. $2,79,404$$(ii)$. $30,06,194$$(iii)$. $28,06,196$$(iv)$. $1,20,719$$(v)$. $20,068$
Kickstart Your Career
Get certified by completing the course
Get Started
Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies