Pancreas: Chemical Digestion 2 Flashcards

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1
Q

What pH does chyme entering the small intestine have?

A

2.5

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1
Q

What is converted into what?

A

Prosecretin is converted into secretin.

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2
Q

What does the secretin do?

A

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

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3
Q

What do the bicarbonate ions do?

A

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

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4
Q

What is inactivated by the higher pH?

A

Pepsin

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5
Q

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

A

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

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6
Q

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

A

Other enzymes are needed to continue protein digestion.

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7
Q

What does secretin also regulate?

A

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

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