Digestion and Absorption

Question 1

Which food substances are considered starch blockers?

Answer 1

Protein
Fiber content

Question 2

Enzymes located at the brush border

Answer 2

Sucrase
Isomaltase
Glucoamylase
Lactase

Question 3

Intestinal transporter of glucose and galactose

Answer 3

Sodium/ glucose linked transporter ( SGLT-1)

Question 4

Intestinal transporter of fructose

Answer 4

Glut5

Question 5

Which enzyme is released by the intestinal epithelial cells for the digestion of proteins

Answer 5

Enterokinase

Question 6

Which enzyme produced by the pancreas can be self activated and activates other pancreatic enzymes?

Answer 6

Trypsin

Question 7

Function of chymotrypsin and elastase

Answer 7

They trim large peptides with neutral amino acids at their C-terminals

Question 8

Function of trypsin

Answer 8

It trims large peptides with basic amino acids at their C-terminals

Question 9

Function of carboxypeptidase A

Answer 9

It removes the neutral amino acids from the C-terminal end

Question 10

Function of carboxypeptidase B

Answer 10

Removes the basic amino acids from the C-terminal end

Question 11

Which type of amino acids are absorbed rapidly and by active transport?

Answer 11

The L-type of amino acids

Question 12

Which type of amino acids are absorbed slowly and by passive transport

Answer 12

The D-type of amino acids

Question 13

The intestinal cotransporters of vitamin C

Answer 13

SVCT1 and SVCT2

Question 14

What is essential for the absorption of vitamin B12?

Answer 14

Intrinsic factor

Question 15

Which cells produce the intrinsic factor?

Answer 15

Parietal cells in the stomach

Question 16

What does vitamin B12 bind to in the stomach

Answer 16

Haptocorrin

Question 17

A person with celiac disease has an autoimmune response to a diet containing a certain protein. This protein is called

Answer 17

Alpha-gliadin

Question 18

Alpha-gliadin is found in a type of protein which is a major structural component of wheat and other grains. What is this protein?

Answer 18

Gluten

Question 19

Cystinuria

Answer 19

Loss of dibasic amino acids ( cysteine,lysine and arginine) through urine due to diminished intestinal absorption

Question 20

Which cofactor helps pancreatic lipases to function more efficiently?

Answer 20

Colipase

Question 21

Which vitamin helps in the absorption of calcium in the duodenum?

Answer 21

Vitamin D3

Question 23

Facilitators of calcium absorption

Answer 23

Lactose
Protein

Question 24

Inhibitors of calcium absorption

Answer 24

Phosphates
Oxalates

Question 25

Which protein binds iron in the intestinal lumen?

Answer 25

Transferrin

Question 26

Which protein binds to iron in the mucosal cells?

Answer 26

Apoferritin

Question 27

What hormone facilitates the absorption of Na+ in the ileum and jejunum?

Answer 27

Aldosterone

Question 28

Water absorption in the small intestine is usually coupled with which food substances?

Answer 28

Glucose Amino acids

Question 29

Which membrane transport mechanism in the jejunum remains functional when one has cholera?

Answer 29

Na+\glucose symport

Question 30

E.coli and V. cholera activate which signaling pathway by the toxins they produce

Answer 30

cAMP pathway