Tooth

Q. What does the crown of a tooth consist of?

1. Enamel
2. Dentine
3. Pulp
4. All of the above

Q.

Bile contribution to digestion is

1. Phagocytosis

2. Emulsification of dietary fats

3. Nucleic acid meta bolism

4. Carbohydrate digestion

Q. The cells which secrete tooth enamel are known as

1. ameloblast
2. osteoclasts
3. odontoblast
4. osteoblast

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. Attachment of teeth in human is called

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