GI

Question 1

how much water is absorbed by the GI tract?

Answer 1

98%

Question 2

How much water is lost through stool daily?

Answer 2

~200ml/day

Question 3

Where in the small intestine does most water absorption take place?

Answer 3

Jejunum

Question 4

How much water is absorbed in the small intestine?

Answer 4

~80%

Question 5

How much water passes through the GI tract each day, on average? What percentages of different substances?

Answer 5

~9L/day

• Food & drink: ~2L
• Pancreatic secretions: ~0.8L
  ○ Saliva: ~1.5L
• Intestinal secretions: ~2L
  ○ Gastric secretions: ~1.5L
• Colonic mucous secretions: ~0.2L
  ○ Bile: ~0.8L