Lipids as Nutrients: Digestion and Absoprtion

Question 1

what is the western diet fat intake composed of?

Answer 1

triacylglycerols

Question 2

What three things stimulate lingual lipase secretion?

Answer 2

neural
dietary fat in meal
mechanical (sucking/swallow)

Question 3

In the stomach, some emulsification of fat exposes enough surface area for lingual lipase to act. How is this accomplished?

Answer 3

By
Muscle contraction of the stomach and
squirting of fat through pyloric sphincter

Question 4

what stimulates the release of bile, and from what organ does it come?

Answer 4

Cholecystokinin is releases bile from the gall bladder

Question 5

What is the role of the panaceas in fat digestion?

Answer 5

releases bicarbonate to nutrilize pH level to make suitable for pancreatic lipase activity

Question 6

what does trypsin do?

Answer 6

trypsin hyddrolizes procolipase

Question 7

What is the path of triacylglycerol degradation?

Answer 7

3 triaclgylycerol to 2-3 diacylglycerol to 2 monoacyl glycerol

Question 8

what are micelles?

Answer 8

negatively charged aggregates

Question 9

where is fat absorbed?

Answer 9

distal duodenum and jujunum

Question 10

where are bile salts absorbed?

Answer 10

terminal illeum

Question 11

where does re-formation of fats occur?

Answer 11

in mucosal intestinal cell of the endoplasmic reticulum

Question 12

what is small fat globule composed of protein and lipid that transports fat from its port of entry in the intestine to the liver and to adipose (fat) tissue

Answer 12

chylomicrons

Question 13

what determines whether fats are distributed via portal blood or the lymphatic system?

Answer 13

the chain length, long chain goes to lymphatic and short and medium go to portal