Deck 9: Host Defense Mechanisms in the Oral Cavity

Question 1

Cementum is the hardest substance in the human body,harder than cortical bone.Enamel is composed of fluorapatite.

A)First statement is true,second statement is false.
B)First statement is false,second statement is true.
C)Both statements are true.
D)Both statements are false.

Answer 1

B
Explanation: B)Enamel is the hardest substance in the human body,composed of fluorapatite.

Question 2

Dentistry is MOST concerned with which immunoglobulins?

A)IgA
B)IgE
C)IgG
D)IgM

Answer 2

A
Explanation: A)Dentistry is most concerned with IgA.Saliva is rich in IgA and initiates the inflammatory process.IgE is found in mammals throughout the body.IgG is found in both blood and other tissue liquids.IgM is located on B cells and found circulating in the blood.

Question 3

Humoral immunity is carried out by T cells from the thymus.Cellular immunity is carried out by the B cells from the bone marrow.

A)First statement is true,second statement is false.
B)First statement is false,second statement is true.
C)Both statements are true.
D)Both statements are false.

Answer 3

D
Explanation: D)Cellular immunity is carried out by T cells from the thymus.Humoral immunity is carried out by the B cells from the bone marrow.Both parts of the lymph system are active in the body's defense against viruses and bacteria.

Question 4

Granulomas are a systemic response to a foreign substance that has invaded a body tissue.Typically,granulomas are painful and must heal on their own so they do NOT recur.

A)First statement is true,second statement is false.
B)First statement is false,second statement is true.
C)Both statements are true.
D)Both statements are false.

Question 5

The blood has a system of granulocytes to find and attack foreign invaders.Granulocytes include which of the following EXCEPT:

A)Neutrophils
B)Candida albicans
C)Macrophages
D)Basophils

Question 6

Which is NOT a protective function of saliva?

A)Lubrication
B)Buffering demineralization
C)Flushing/rinsing
D)Remineralization of tooth structures
E)All of the above are functions of saliva

Question 7

To control acid in plaque,protective ions are increased and damage is controlled through dilution and chemical buffering.Saliva acts as a strong buffer for the acidic plaque.

A)First statement is true,second statement is false.
B)First statement is false,second statement is true.
C)Both statements are true.
D)Both statements are false.

Question 8

Which bacteria are responsible for caries formation?

A)Streptococcus oralis
B)Streptococcus mutans
C)Lactobacillus
D)Both A and B
E)Both B and C
F)All of the above

Question 9

Epithelium stands as a barrier to microbial invasion.Infection cannot occur without microbes getting past this anatomic barrier.

A)First statement is true,second statement is false.
B)First statement is false,second statement is true.
C)Both statements are true.
D)Both statements are false.

Question 10

Which of the following is NOT part of the defense system to ensure the safety of the body from infection?

A)Normal oral flora
B)Saliva
C)Anatomic barriers
D)All of the above