Nutrition:Digestive System:Biology Chapter 6

Mouth

• Salivary glands secreted salivary amylase

Starch + Water - Maltose



Stomach

• Acidic- Hydrochloric acid - stops amylase action

• Gastric Glands secreted Gastric Juice

1)Pepsin
Proteins + Water - Polypeptides


2)Renin
Carsinogen + Water - Casein




Duodenum

• Pancrealic juice is alkaline which is secreted by Pancreas

1) Pancreatic amylase
Starch + Water - Maltose


2)Trypsin
Polypeptides + Water - Peptides


3)Lipase
Lipids + Water - Futty acids + Glyserol




Ileum

• Glands in ileum's walls secreted intestinal juice

1)Maltase
Maltose + Water - Glucose


2)Sucrase
Sucrose + Water - Glucose + Fructose


3)Lactase
Lactose + Water - Glucose + Galactose


4)Erepsin
Peptides + Water - Amino Acids



Catabolic pathways release energy by breaking down complex molecules into simpler compounds
Digestive enzymes break down
eg. : food - release energy


Anabolic pathways consume energy to build complex molecules from simpler ones
eg. : amino acids link to form muscle protein