Unit 1 - DIGESTION

HideShow resource information
Describe a biochemical test that could be performed on a sample of food to determine whether it contained triglycerides.
dissolve in / add ethanol then mix with water; emulsion / white colour indicates triglycerides present;
1 of 10
Explain how the small intestine is adapted to its function in the absorption of the products of digestion.
large surface area provided by villi / microvilli; long / folds increase surface area / time for absorption; thin epithelium; short diffusion pathway; capillary network absorbs amino acids / sugars; lacteal for absorption of digested fats; mito
2 of 10
Describe how maltose in the small intestine is digested, absorbed and transported to the liver as glucose
Hydrolysed by maltase; Maltase enzymes in membranes of epithelial cells of small intestine; Glucose absorption involves diffusion; Associated with uptake of sodium ions; Involves active transport/energy dependent; Requires carrier molecules; R
3 of 10
Describe how carbohydrate eaten as starch is digested to produce glucose.
Starch digested to maltose by amylase; Found in saliva; Secreted by pancreas; Maltase converts maltose to glucose; Found in membranes of cells lining small intestine; Both reactions involve hydrolysis;
4 of 10
Describe how glucose is absorbed from the small intestine.
Glucose absorption involves diffusion; Associated with uptake of sodium ions; Involves active transport/energy dependent; Requires carrier molecules; Role of villi and microvilli in increasing surface area;
5 of 10
Name the process in which fatty acids are combined with glycerol
Condensation
6 of 10
Explain the importance of Mitochondria in the absorption of digested foods
Provide energy/for active uptake;
7 of 10
Explain the importance of Microvilli in the absorption of digested foods
Increase surface area
8 of 10
Describe and explain the roles of diffusion, facilitated diffusion and active transport in the absorption of digested food by the ileum.
facilitated diffusion movement along / down concentration gradient; reference to carrier / channel proteins; monosaccharides or named / amino acids move into epithelial cells; active transport movement against concentration gradient; energy
9 of 10
Describe the role of the enzymes of the digestive system in the complete breakdown of starch.
Amylase; Sciencemathsmaster.weebly.com 7 (Starch) to maltose: Maltase; Maltose to glucose; Hydrolysis; (Of) glycosidic bond;
10 of 10

Other cards in this set

Card 2

Front

Explain how the small intestine is adapted to its function in the absorption of the products of digestion.

Back

large surface area provided by villi / microvilli; long / folds increase surface area / time for absorption; thin epithelium; short diffusion pathway; capillary network absorbs amino acids / sugars; lacteal for absorption of digested fats; mito

Card 3

Front

Describe how maltose in the small intestine is digested, absorbed and transported to the liver as glucose

Back

Preview of the front of card 3

Card 4

Front

Describe how carbohydrate eaten as starch is digested to produce glucose.

Back

Preview of the front of card 4

Card 5

Front

Describe how glucose is absorbed from the small intestine.

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all Health, illness and disease resources »