Digestive System Very Short Answer Biology Class-9 ICSE Selina Publishers Solutions Chapter-11. Step By Step ICSE Selina Concise Solutions of Chapter-11 Digestive System with Exercise-11 including MCQs, Very Short Answer Type, Short Answer Type, Long Answer Type and Structured/Application Questions Solved . Visit official Website CISCE for detail information about ICSE Board Class-9.
Digestive System Exe-11 Very Short Answer Biology Class-9 ICSE Concise Selina Publishers
| Board | ICSE |
| Publications | Selina Publication |
| Subject | Biology |
| Class | 9th |
| Chapter-11 | Digestive System |
| Book Name | Concise |
| Topics | Solution of B. Very Short Answer Type |
| Academic Session | 2023-2024 |
B. Very Short Answer Type
Digestive System Class-9 Biology Concise Solutions
Page 120
Question 1.
What is the dental formula of a normal human adult?
Answer:
The dental formula of a normal human adult is:
Human adult = = 32 (Permanent teeth + Wisdom teeth)
Question 2.
Mention two reflexes which occur when a person chews and swallows food.
Answer:
The two reflexes which occur when a person chews and swallows food are:
Reflex when a person chews – Secretion of saliva
Reflex when a person swallows – Tongue presses upward and back against the roof (palate)
Question 3.
Consider the following two statements A and B and select the right option from (i)-(iv) about their correctness.
A. Small intestine is shorter than large intestine.
B. Small intestine is wider than large intestine.
Options :
(i) Both the statements are correct
(ii) Both the statements are wrong
(iii) Statement A is correct, B is wrong
(iv) Statement B is correct, A is wrong
Answer:
(ii) Both the statements are wrong. Small intestine is longer (7 metres) than large intestine (1.5 metres). Also, large intestine is so called because of its width which is larger than that of small intestine.
Question 4.
Match the terms given in column A with those of column B.
| Column A | Column B |
|---|---|
| Ptyalin | Proteins and peptides |
| Rennin | Emulsified fat |
| Erepsin | Protein |
| Steapsin | Starch |
| Pepsin | Casein |
Answer:
| Column A | Column B |
|---|---|
| Ptyalin | Starch |
| Rennin | Casein |
| Erepsin | Proteins and peptides |
| Steapsin | Emulsified fat |
| Pepsin | Protein |
Question 5.
Name these:
(a) Two main divisions of the digestive system
(b) Three digestive glands
(c) Three pairs of salivary glands
(d) Three parts small intestine
(e) Three parts of large intestine
Answer:
(a) Alimentary canal and digestive glands.
(b) Salivary gland, liver and pancreas.
(c) Parotid glands, sub-mandibular glands and sublingual glands.
(d) Duodenum, Jejunum, Ileum.
(e) Caecum, Colon, Rectum.
B. Very Short Answer Type
Digestive System Class-9 Biology Concise Solutions
Page 121
Question 6.
(c) Glucose, Fructose, Galactose, Starch
(d) Ileum, Colon, Duodenum, Jejunum
(e) Palate, Crown, Root, Neck
Answer:
(a) Steapsin is odd one out. Remaining terms (Pepsin, Trypsin and Erepsin) are protein digesting enzymes.
(b) Peptidase is odd one out. Lactase, Invertase and Maltase are sugar digesting enzymes.
(c) Starch is odd one out. Glucose, Fructose and Galactose are simple sugar.
(d) Colon is odd one out. Ileum, Duodenum and Jejunum are parts of small intestine.
(e) Palate is odd one out. Crown, Root and Neck are parts of teeth.
— : End of Digestive System B. Very Short Answer Class-9 ICSE Biology Solutions :–
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