Digestive System Very Short Answer Biology Class-9 ICSE Selina Publishers

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.

Choose the odd one out and write the category of the remaining terms :(a) Pepsin, Trypsin, Steapsin, Erepsin(b) Lactase, Peptidase, Invertase, Maltase

(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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