Biochemical reaction in the digestive system

Question 1

Saliva (mouth)

Answer 1

Starch + water -salivary amylase-> maltose

Question 2

Pepsinogen (cheif cells, gastric glands)

Answer 2

Protein + water -pepsin-> polypeptides

Question 3

Hydrochloric acid (parietal cells, gastric gland)

Answer 3

Provides acidic medium for pepsin action

Question 4

Mucus (mucous cells, gastric glands)

Answer 4

protects wall of stomach from acidity of hydrochloric acid

Question 5

What does the pancreas secrete

Answer 5

Secretes pancreatic amylase, trypsin, and lipase

Question 6

Biochemical reaction in the duodenum

Answer 6

1. Starch + water -pancreatic amylase-> maltose
2. Polypeptide + water -trypsin-> peptides
3. Lipid + water -lipase-> fatty acid and glycerol

Question 7

What do glands on the ileum wall secrete besides mucus

Answer 7

Intestinal juice

Question 8

What does intestinal juice contain

Answer 8

maltase, sucrase, lactase, lipase and erepsin

Question 9

carbohydrate digestion in the ileum

Answer 9

1. Maltose + water -maltase-> glucose
2. Sucrose + water -sucrase-> glucose + fructose
3. Lactose + water -lactase-> glucose + galactose

Question 10

lipid digestion in the ileum

Answer 10

Lipid + water -lipase-> Fatty acids + glycerol

Question 11

protein digestion in the ileum

Answer 11

Peptides + water -erepsin-> amino acids

Question 12

digested food that is absorbed through epithelial cells into blood capillaries

Answer 12

Fructose, glucose, galactose, amino acids vitamins B and C, and water

Question 13

digested food that is absorbed through epithelial cells into lacteal

Answer 13

Fatty acids, glycerols, vitamins A,D,E,K