Tooth

Q.

Pulp cavity of a tooth is lined by-

1. odontoblasts

2. chondroblasts

3. osteoblasts

4. ameloblasts

Q. Which of the following are characteristics of human teeth?

1. They are thecodont
2. They are heterodont
3. They are diphyodont
4. All of the above

Q. The hardest constituent of teeth is

1. enamel
2. dentine
3. pulp
4. none of the above

Q. Match the following:

$\begin{array}{cc}\text{Parts of teeth}& \text{Description}\\ \text{1. Enamel}& \text{i) It is a calcified substance that helps in joining}\\ & \text{the teeth in the socket.}\\ \text{2. Dentine}& \text{ii) It consists of connective tissue, nerve fibres,}\\ & \text{lymph and blood vessels.}\\ \text{3. Cement}& \text{iii) It is the outermost layer of the teeth and}\\ & \text{the hardest substance of the body.}\\ \text{4. Pulp cavity}& \text{iv) It joins enamel and pulp.}\end{array}$

1. 1-iii, 2-ii, 3-i, 4-iv
2. 1-iii, 2-i, 3-iv, 4-ii
3. 1-iii, 2-iv, 3-i, 4-ii
4. 1-ii, 2-iv, 3-i, 4-iii

Q. Pulp cavity of teeth is lined by

1. Odontoblasts
2. Chondroblasts
3. Osteoblasts
4. Ameloblasts

Q. Select the incorrect statements
A. Alimentary canal begins with the opening called mouth
B. Tooth is embedded in a socket of mandible bone only
C. All human teeth show strict diphyodont type of dentition
D. Pharynx opens posteriorly into the oesophagus and larynx

1. A, B, C and D
2. B and C
3. A, C and D
4. A, B and D

Q. Match the following
$\begin{array}{cc}\text{Parts of teeth}& \text{Description}\\ \text{1. Enamel}& \text{i) It is a calcified substance that helps in joining}\\ & \text{the teeth in the socket}\\ \text{2. Dentine}& \text{ii) It consists of connective tissue, nerve fibres,}\\ & \text{lymph and blood vessels.}\\ \text{3. Cement}& \text{iii) It is the outermost layer of the teeth and}\\ & \text{the hardest substance of the body.}\\ \text{4. Pulp cavity}& \text{iv) It joins enamel and pulp.}\end{array}$

1. 1-iii, 2-ii, 3-i, 4-iv
2. 1-iii, 2-i, 3-iv, 4-ii
3. 1-iii, 2-iv, 3-i, 4-ii
4. 1-ii, 2-iv, 3-i, 4-iii

Q. Which one of the following is a vestigial organ of humans?

1. Hair
2. Intestine
3. Wisdom teeth
4. Muscle of glottis

Q. Odontoblast cells form ______________ of human teeth.

1. enamel
2. cement
3. pulp cavity
4. dentine

Q. If the parietal cells of the gut epithelium become partially non-functional, what is likely to happen?

1. Steapsin will be more effective.
2. Proteins will not be adequately hydrolysed by pepsin into proteases and peptones.
3. The pancreatic enzymes, specially the trypsin and lipase will not work efficiently.
4. The pH of the stomach will fall abruptly.

Q. Attachment of teeth in human is called

1. monophyodont
2. polyphyodont
3. thecodont
4. acrodont

Q.

In the given figure of a human tooth. Identify the parts labeled and match them with their relative description and choose the correct option:

1. 1.→i), 2.→ii), 3.→iv), 4.→iii)

2. 1.→iii), 2.→ii), 3.→i), 4.→iv)

3. 1.→iii), 2.→iv), 3.→ii), 4.→i)

4. 1.→iv), 2.→i), 3.→iii), 4.→ii)