Digestion And Absorbtion

Question 1

If the terminal ileum is resected, absorption of what is abolished?

Answer 1

Vitamin B12 and bile salts

Question 2

What is the major mechanism of protein uptake and where does this take place?

Answer 2

Pinocytosis at the base of the microvilli by the enterocyte membrane

Question 3

What are the 3 end products of carbohydrate digestion?

Answer 3

Glucose, Galactose, Fructose

Question 4

What 2 end products of carb digestion are cotransported with Na and what is the transporter called?

Answer 4

Glucose and Galactose

SGLT1

Question 5

What is the transporter that take fructose from the lumen into the enterocyte

Answer 5

GLUT5

Question 6

What transporter takes all the end products of carb digestion from the enterocyte to the blood?

Answer 6

GLUT2

Question 7

Defect in Na/amino acid cotransporter causing loss of transport of Di-basic amino acids (cystine, lysine, arginine, and ornithine).

Answer 7

Cystinuria

Question 8

Inability to transport neutral amino acids (tryptophan) so these and byproducts get excreted in urine (serotonin).

Answer 8

Hartnup disease

Question 9

Lack of this causes abetalipoproteinemia which means you can’t absorp dietary lipids

Answer 9

ApoB