Question
Question 102:
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.
(a) What are (i) organisms A, and (ii) substance B?
(b) What are (i) part C, and (ii) part D, of tooth known as?
(c) By what name are the holes E in the tooth known?
(d) Name the part F of the tooth.
(e) What will happen if organisms A reach part F of the tooth known?
Found 2 tutors discussing this question
Discuss this question LIVE
11 mins ago
Text solutionVerified
Answer:
(a) (i) Organism A is bacteria and (ii) substance B is acid.
(b) (i) Part C is the tooth enamel and (ii) part D is the dentine of the tooth.
(c) The small holes, E, are known as cavities.
(d) F is the pulp of the tooth.
(e) When bacteria (organism A) reaches the pulp (part F) of the tooth, it irritates the nerve endings and causes toothache.
(b) (i) Part C is the tooth enamel and (ii) part D is the dentine of the tooth.
(c) The small holes, E, are known as cavities.
(d) F is the pulp of the tooth.
(e) When bacteria (organism A) reaches the pulp (part F) of the tooth, it irritates the nerve endings and causes toothache.
Was this solution helpful?
28
Share
Report
One destination to cover all your homework and assignment needs
Learn Practice Revision Succeed
Instant 1:1 help, 24x7
60, 000+ Expert tutors
Textbook solutions
Big idea maths, McGraw-Hill Education etc
Essay review
Get expert feedback on your essay
Schedule classes
High dosage tutoring from Dedicated 3 experts
Practice more questions from Biology (Lakhmir Singh)
Q1
Question 101:
Which of the following is the correct sequence of parts as they occur in the human alimentary canal?
(a) Mouth → Stomach → Small intestine → Oesophagus → Large intestine
(b) Mouth → Oesophagus → Stomach → Large intestine → Small intestine
(c) Mouth → Stomach → Oesophagus → Small intestine → Large intestine
(d) Mouth → Oesophagus → Stomach → Small intestine → Large intestine
(a) Mouth → Stomach → Small intestine → Oesophagus → Large intestine
(b) Mouth → Oesophagus → Stomach → Large intestine → Small intestine
(c) Mouth → Stomach → Oesophagus → Small intestine → Large intestine
(d) Mouth → Oesophagus → Stomach → Small intestine → Large intestine
Q2
Question 102:
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.
(a) What are (i) organisms A, and (ii) substance B?
(b) What are (i) part C, and (ii) part D, of tooth known as?
(c) By what name are the holes E in the tooth known?
(d) Name the part F of the tooth.
(e) What will happen if organisms A reach part F of the tooth known?
(a) What are (i) organisms A, and (ii) substance B?
(b) What are (i) part C, and (ii) part D, of tooth known as?
(c) By what name are the holes E in the tooth known?
(d) Name the part F of the tooth.
(e) What will happen if organisms A reach part F of the tooth known?
Q3
Question 103:
If the teeth are not cleaned regularly, they become covered with a sticky yellowish layer W of food particles and bacteria. Since layer W covers the teeth, the alkaline liquid X secreted by glands Y inside the mouth cannot reach the teeth surface to neutralise the acid formed by the action of organisms Z on sugary food, and hence tooth decay sets in.
(a) What is W known as?
(b) What is (i) X, and (ii) Y?
(c) What are organisms Z?
(d) State one way of removing layer W from the teeth.
View all(a) What is W known as?
(b) What is (i) X, and (ii) Y?
(c) What are organisms Z?
(d) State one way of removing layer W from the teeth.
Practice questions from Biology (Lakhmir Singh)
Question 1
Views: 5,323
(a) man
(b) fish
(c) dog
(d) sparrow
Question 2
Views: 5,580
Question 3
Views: 5,556
Question 4
Views: 6,025
(a) Which organism is (i) omnivore (ii) herbivore, and (ii) carnivore?
(b) Which organism is an autotroph?
(c) Which organism is/are heterotroph(s)?
(d) Which organism can be a producer?
(e) Which organism is/are consumer (s)?
(f) Give one example each of organisms which could be like (i) A (ii) B (iii) C, and (iv) D
Practice more questions from Life Processes
Question 1
Views: 5,831
(b) What type of arrangement exists in the bodies of large animals to meet their oxygen requirements adequately?
(c) What advantage a terrestrial animal has over an aquatic animal with regard to obtaining oxygen for respiration?
Practice questions on similar concepts asked by Filo students
Question 1
Views: 5,959
Question 3
Views: 5,539
Question 4
Views: 5,104
Stuck on the question or explanation?
Connect with our Science tutors online and get step by step solution of this question.
231 students are taking LIVE classes
Question Text |
Question 102:
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. (a) What are (i) organisms A, and (ii) substance B? (b) What are (i) part C, and (ii) part D, of tooth known as? (c) By what name are the holes E in the tooth known? (d) Name the part F of the tooth. (e) What will happen if organisms A reach part F of the tooth known? |
Topic | Life Processes |
Subject | Science |
Class | Class 10 |
Answer Type | Text solution:1 |
Upvotes | 28 |