digestion flashcards exam qs

Question 1

Describe the processes involved in the absorption and transport of
digested lipid molecules from the ileum into lymph vessels.

Answer 1

• micelles contain bile salts, fatty acids and monoglycerides
• release fatty acids and monoglycerides when come into contact with epithelial cells
• absorbed by diffusion
• recombine in endoplasmic reticulum to form triglycerides
• move out of epithelial cell into lymph vessels by exocytosis

Question 2

Describe the role of micelles in the absorption of fats into the cells lining
the ileum.

Answer 2

• micelles include bile salts and fatty acids
• release fatty acids when come into contact with epithelial cells
• absorbed by diffusion

Question 3

What is peristalsis ?

Answer 3

Smooth muscle contraction occurs in the oesophagus to help the food bolus travel down to the stomach

Question 4

What enzymes are found in pancreatic juices released into duodenum ?

Answer 4

Lipase, amylase, exo and endopetidases

Question 5

What membrane bound enzymes are found in duodenum ?

Answer 5

Maltase, sucrase and lactase
Matase- broken down into alpha glucose
Sucrase - broken down into glucose and fructose
Lactase- broken down into glucose and galactose

Question 6

What is the difference between endothelial and epithelial cells ?

Answer 6

Endothelial - on the inside of the body
Epithelial - on the outside of the body