Molecular Basis of Gastrointestinal Tract Flashcards
1
Q
What does the stomach secrete that begins stomach protein digestion?
A
secretes acid and digestive enzymes (pepsin)
2
Q
What is the small intestine composed of?
A
Duodenum, jejunum, ileum
3
Q
What is the use of the Duodenum?
A
receives digestive enzymes and bile > breakdown of protein/fats
4
Q
What is the use of the Jejunum?
A
absorption of sugars, amino acids, fatty acids into blood stream
5
Q
What is the use of the ileum?
A
absorption of vitamin B12 > other nutrients
6
Q
What is the separation between the upper and lower GI tract?
A
the duodenojejunal junction
7
Q
What is the purpose of the large intestine?
A
Extracts water and salts from solid waste before elimination > no role in nutrient absorption
8
Q
What are the four concentric layers?
A
mucosa, submucosa, muscular layer, serosa
