absorption in the small intestine

Question 1

function of small intestine:

Answer 1

its where small soluble molecules that are a result from digestion are absorbed into the bloodstreams

Question 2

once the absorbs these nutrients, they are needed and used in

Answer 2

metabolism

Question 3

what is glucose used?

Answer 3

• respiration
• makes carbohydrates

Question 4

what are amino acids used for?

Answer 4

• to make proteins

Question 5

what are fatty acids and glycerol used for?

Answer 5

• to make lipids

Question 6

what is concentration gradient?

Answer 6

when there is a difference in the concentration

Question 7

what are the specialised cells in the small intestine called?

Answer 7

FOLDED epithelial cells that form epithelial tissue

Question 8

what is the advantage of epithelial cells being folded?

Answer 8

• increases amount of microvilli which will lead to a greater surface area

Question 9

difference between ciliated epithelial cells and folded epithelial cells.

Answer 9

• ciliated found in the trachea
• folded- found in the lining of the small intestine

Question 10

what are some features of the structure of the small intestine?

Answer 10

• 6 meters long- its long meaning it can absorb more small soluble molecules in less time
• villi and microvilli- increase the surface area
• thin villi making the pathway of diffusion shorter
• good flow of blood- molecules that are absorbed in the blood will maintain a constant concentration gradient- for diffusion

Question 11

what is diffusion?

Answer 11

the movement of particle from a higher concentration to an area of lower concentration

Question 12

how is a concentration gradient maintained in villi-5

Answer 12

because there is a good supply of blood

Question 13

why do cells in the small intestine have many mitochondria

Answer 13

in order to release energy for active transport