Digestion in the mouth

Question 1

What is mechanical digestion?

Answer 1

• Breaks into pieces
• Mixes with the saliva forming a bolus.

Question 2

Amylase (chemical digestion)

Answer 2

• Begins starch digestion at pH of 6.5 or 7.0 found in the mouth.
• When bolus and enzyme hit the pH 2.5 gastric juices hydrolysis ceases.

Question 3

Lingual lipase (chemical digestion)

Answer 3

• Secreted by glands in the tongue.
• It is an acid lipase can work at pH 3-6 and works in the absence of bile emulsification.
• Begins breakdwon of triglycerides into glycerol and 3 fatty acids.