Chapter 17 Integumentary System

Chapter 17  Integumentary System

Complete Chapter Questions And Answers
 

Sample Questions

MULTIPLE CHOICE

Directions: Each group of questions below consists of a numbered list of descriptive words or phrases accompanied by a diagram with certain parts indicated by letters or by a list of lettered headings. For each numbered word or phrase, select the lettered part or heading that matches it correctly and then insert the letter in the space to the right of the appropriate number. Sometimes more than one numbered word or phrase may be correctly matched to the same lettered part or heading.

1. ________ Periodontal ligament
a.
Dental pulp
b.
Predentin
c.
Dental sac
d.
Enamel
e.
Cement

ANS: C
The periodontal ligament is derived from the dental sac, a capsule-like structure that develops from the mesenchyme surrounding the tooth.

2. ________ Odontoblasts
a.
Dental pulp
b.
Predentin
c.
Dental sac
d.
Enamel
e.
Cement

ANS: B
The odontoblasts derived from mesenchymal cells in the dental papilla (future pulp) give rise to predentin and deposit it adjacent to the inner enamel epithelium. Later, the predentin calcifies and becomes dentin.

3. ________ Inner enamel epithelium
a.
Dental pulp
b.
Predentin
c.
Dental sac
d.
Enamel
e.
Cement

ANS: D
Cells of the inner enamel epithelium adjacent to the dentin differentiate into ameloblasts. These cells produce enamel in the form of prisms (rods) and deposit it over the dentin.

4. ________ Contains vessels and nerves
a.
Dental pulp
b.
Predentin
c.
Dental sac
d.
Enamel
e.
Cement

ANS: A
The dental pulp derived from the mesenchymal dental papilla of the embryo contains the vessels and nerves of the tooth.