Exam 4. Protein digestion

Question 1

protein sources

Answer 1

Dietary
Digested Enzymes
Sloughed epithelial cells

Question 2

Protease

Answer 2

Enzymes that digest protein

Question 3

Pepsin

Answer 3

Primary enzyme that initiates protein digestion
Secreted in the stomach
Cuts between tyrosine and phenylalanine

Question 4

Zymogens that become active in duodenum

Answer 4

Trypsin, chymotrypsin, carboxypeptidase

Pancreatic secretions

Question 5

Trypsin, chymotrypsin

Answer 5

Have specific amino acid sites where they are going to cut

Peptides chains get even smaller

Question 6

Carboxypeptidase

Answer 6

Provides free amino acids

It cuts at free carboxo end

Question 7

Brush border enzymes

Answer 7

At the micro villi of enterocyte
Aminopeptidase
Dipeptidase

Question 8

Aminopeptidase

Answer 8

Cuts at the free amino end

Question 9

Dipeptidase

Answer 9

Cuts between the last two amino acids

Question 10

Where do we get the free amino acids from protein

Answer 10

In the jejunum

Question 11

How do we absorb the free amino acids

Answer 11

Just like the carbs
Secondary active transport to bring amino acids
Instead of using a sodium glucose transporter
the cell uses a sodium __amino___ transporter