6.3 Absorption

Question 1

What is absorbtion

Answer 1

• Absorption is the process where digested food substances are absorbed into the body cells.

Question 2

Why is the Small intestine long

Answer 2

To Provide sufficient time for absorption to take
place.

Question 3

why is the Small intestine is lined with many villi, each
possessing numerous microvilli.

Answer 3

To increase surface area to volume ratio for
absorption of digested food particles.

Question 4

why is the The epithelium of the villus only one cell thick.

Answer 4

To reduce the distance for digested products to
diffuse into the blood vessels.

Question 5

Why does the small intestine consists of a dense network
of blood capillaries and lacteal or lymphatic
capillaries within the intestinal walls and villi.

Answer 5

For Continuous transport of digested food
substances maintains the steep concentration
gradient for fast absorption of digested
particles.

Question 6

Transport processes for Monosaccharides

Answer 6

Diffusion, active transport

Question 7

Transport processes for Amino acids

Answer 7

Diffusion, active transport

Question 8

Transport processes for Fatty acids and glycerol

Answer 8

Diffusion

Question 9

Transport processes for Water

Answer 9

Osmosis

Question 10

Transport processes for Mineral salts

Answer 10

Diffusion, active transport

Question 11

What happens to Undigested and unabsorbed matter

Answer 11

• Undigested and unabsorbed matter is stored temporarily in the rectum.
• They are discharged as faeces through the anus through egestion.