Digestive System Part A + B: Mouth

Question 1

4 Basic processes of Digestion

Answer 1

1. Digestion
2. Absorption
3. Motility
4. Secretion

Question 2

Digestive tract

Answer 2

mouth to anus

Question 3

what is digestion?

Answer 3

breakdown of large food pieces into small molecules

• mechanical-motility
• chemical-enzymes with acid

Question 4

Absorption in the mouth

Answer 4

• no food

- some drugs

Question 5

what is motility?

• how does it mix
• how does it move

Answer 5

smooth muscle contractions in tract:

• segmentation and churning
• peristalsis

Question 6

what is secretion?

Answer 6

digestive juice into lumen

Question 7

Salivary glands

• what does it do
• contains:
• PSNS
• SNS

Answer 7

saliva moistens and prevents caries

• contains lysozyme, antibodies
• PSNS: stimulates secretion of thin, enzyme rich saliva
• SNS: mucus rich saliva

Question 8

Digestion in the mouth

Answer 8

1. CHO (starch/glycogen) broken down by salivary amylase (pH~7) into disaccharide and oligosaccharides
2. triglycerides brown down by lingual lipase into FA and monoglycerides