A science teacher is talking to a group of fifth graders about the role of "spit." During the course of the discussion, the teacher asks the students which of the following are functions of saliva?

Question

A)
Good protection device if someone is being attacked
B)
Will have more saliva production when anxious, such as right before a test
C)
Has antibacterial action to help keep the mouth clean
D)
Secretes acid to chemically break down fatty foods like French fries
E)
Secretes the enzyme pepsin

Answer 1

Ans:
C

Feedback:

Saliva has three functions. The first is to protect and lubricate. The second is to provide antimicrobial protection. The third is to initiate digestion of starches by secreting enzymes. If anxious, SNS activity causes dry mouth. Saliva begins breaking down starches (carbohydrates), not fatty foods. The chief cells secrete pepsinogen, which is converted into pepsin, the enzyme that breaks down protein. This occurs in the stomach.