Unit 2 - KA7 Absorption of materials

Question 1

What are the two main exchange organs in the body?

Answer 1

The lungs and the small intestine

Question 2

Describe villi structure

Answer 2

Small finger like projections that line the inner wall of the small intestine

Question 3

What products does villi absorb?

Answer 3

Glucose, amino acids, fatty acids and glycerol

Question 4

What is the function of large surface area in villi?

Answer 4

Allows fast absorption of the products in digestion

Question 5

What is the function of thin walls in villi?

Answer 5

The wall is only 1 cell thick allowing easy absorption of the products of digestion

Question 6

What is the function of extensive blood supply in villi?

Answer 6

Capillary networks run through the villi allowing products of carbohydrate and protein digestion to easily move into the blood stream

Question 7

What is the function of a large surface area in alveoli?

Answer 7

A large volume of oxygen can be absorbed into the bloodstream and carbon dioxide can move out

Question 8

What is the function of thin walls in alveoli?

Answer 8

Gases can rapidly diffuse across the alveolar membrane

Question 9

What is the function of extensive blood supply in alveoli?

Answer 9

Capillary networks are in close contact with the alveoli allowing gases to easily move into and out of the blood stream