Pancreas: Chemical Digestion 2

Question 1

What pH does chyme entering the small intestine have?

Answer 1

2.5

Question 1

What is converted into what?

Answer 1

Prosecretin is converted into secretin.

Question 2

What does the secretin do?

Answer 2

Stimulates the liver to make more bile and encourages the pancreas to release bicarbonate ions.

Question 3

What do the bicarbonate ions do?

Answer 3

Neutralizes the acidic chyme and raises the pH from 2.5 to approximately 9.0.

Question 4

What is inactivated by the higher pH?

Answer 4

Pepsin

Question 5

Because of the inactivation of pepsin by the higher pH, what is protected and from what?

Answer 5

The small intestine is protected from the high pH of the stomach acid.

Question 6

What is needed when pepsin is inactivated in the small intestine?

Answer 6

Other enzymes are needed to continue protein digestion.

Question 7

What does secretin also regulate?

Answer 7

The entering of more food into the small intestine from the stomach until the current batch is digested.