nutrition in humans

Question 1

where is bile produced?

Answer 1

liver

Question 2

how is the small intestine adapted for its role of absorbing nutrients?

Answer 2

an inner wall with large circular folds
finger-like projections on the inner wall called villi
each epithelial cell of the villi has smaller finger-like projections called microvilli

Question 3

how do the adaptations help in absorption of nutrients?

Answer 3

surface area is increased, larger surface area for absorption
villi have one cell thick walls for diffusion over a shorter distance
each villus has a network of capillaries to increase surface area

Question 4

how does the blood from the small intestine travel to the liver

Answer 4

via the hepatic portal vein

Question 5

when blood glucose level is high

Answer 5

islets of langerhans in the pancreas secret insulin

liver cells convert glucose to glycogen, stored in the liver

Question 6

roles of liver

Answer 6

carbohydrate metabolism and regulation of blood glucose level
fat metabolism
protein metabolism
detoxification