Structure of the Teeth

Q.

Describe the structure of the tooth with the help of a labelled diagram

Q.

How are the three germ layers formed?

Q.

Which germ layer develops into bones, kidneys and ovaries?

Q.

Nasal chambers and buccal cavity are separated by

1. Palatine

2. Palate

3. Vulva

4. None of these

Q.

Choose the correct one:

1. Ectoderm- Liver

2. Mesoderm- Brain

3. Mesoderm- Skeleton

4. Ectoderm - Epidermis

Q.

Why are rings of cartilage and mucous-secreting cells present in trachea?

Q. What is germ layer ie.ectoderm, mesoderm, endoderm

Q.

The hardest substance in the human body is

1. Dentine

2. Enamel

3. Collagen

4. Melanin

Q. is a mineral found in our teeth and bones.

1. Iodine
2. Calcium
3. Iron

Q. Blood vessels and nerves of a tooth are present in

1. Pulp cavity
2. Dentine
3. Crown of a tooth
4. Enamel

Q. Pulp cavity of a tooth is lined by

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

Q.

Name the following parts of a tooth:-

Part embedded in a cup-like socket of the jawbone

Q. If tooth is embedded in a socket of jaw bone then its is known as:

1. thecodont
2. heterodont
3. diphyodont
4. All of these

Q. Calcium and ............. gives rigidity to bones and teeth.

1. Oxalate
2. Pectate
3. Carbonate
4. Phosphate
5. Sulphate

Q. Crown of teeth is covered by

1. Cementum
2. Dentine
3. Enamel
4. Both B and C

Q. Enamel is principally composed of

1. Calcium sulphate
2. Calcium phosphate
3. Calcium chloride
4. Sodium phosphate

Q. Bone like substance present in a human tooth is _________.

1. Enamel
2. Dentine
3. Pulp
4. None

Q.

Elongated cells with thickenings at corner constitute ___________.

Q. The outer portion of the tooth is called

1. Crown
2. Root
3. Enamel
4. Pulp