Digestive System Mod 12

Question 1

What are the 2 types of digestion and what is the functions?

Answer 1

1. Mechanical: chewing, swallowing and peristalsis

2. Chemical: breaks up food molecules into smaller molecules

Question 2

What are the 6 basic functions (in order) of digestion?

Answer 2

1. Ingestion: eating or drinking by mouth
2. Secretion: saliva breaking down enzymes in mouth
3. Mixing/propulsion: contraction and relaxation of muscles
4. Digesting: breaking down food into smaller pieces
5. Absorption: taking in nutrients and water from food
6. Defection: poop what’s left

Question 3

What are the 4 layers of the digestive tract?

Answer 3

1. Mucosa: mucus production
2. Submucosa: connective tissue layers
3. Muscularis: muscle layer
4. Serosa: serous membrane that covers outside organs

Question 4

What are the 3 sets of salivary glands and their functions?

Answer 4

1. Parotid glands: secretes serous saliva that have digestive enzymes
2. Submandibular glands: produces both serous and mucus saliva
3. Sublingual glands: produces mucus saliva

Question 5

What are the 4 parts of the stomach?

Answer 5

1. Cardia: the part where the esophagus meets the stomach
2. Fundus: upper most area
3. Body: largest party between the fundus and pylorus
4. Pylorus: divides into the antrum and canal

Question 6

Why are the 4 types of cells in the stomach?

Answer 6

Mucous cells: secrete alkaline mucous to protect the epithelium from stomach acid
Parietal cells: secretes stomach acid
Chief cells: secretes pepsin
G cells: secretes gastrin

Question 7

What are the 3 parts of the small intestine?

Answer 7

1. Duodenum
2. Jejunum
3. Ileum