Trace the pathway of a ham sandwich (ham = protein and fat; bread =
carbohydrates) from the mouth to the site of absorption of its
breakdown products, noting where digestion occurs and what specific
enzymes are involved.
Protein
Carbohydrates
Fats
Oral
Cavity
none
Salivary
amylase
Lingual lipase
Pharynx
none
none
none
Esophagus
none
none
none
none
none
Stomach
Small
Intestine
1. Pepsin
2. HCl
1. Protease
(pancreas)
1. Carbohydrase
(pancreas)
2. Lactase,
2. Dipeptidase
maltase &
(brush border)
sucrase
(brush border)
Lipase
(pancreas)
Final
Absorbed
Product
Amino acids
Simple sugars
Monoglyceride &
fatty acids
Combined into
chylomicrons
Absorbed
into
Capillaries
Capillaries
Lacteals