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Chemical Digestion and Absorption in the Small Intestine

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Chemical Digestion and Absorption in the Small Intestine

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Questions and Answers

What is the primary means of moving food through the small intestine?

Diffusion

Peristalsis (correct)

Active transport

Segmental movements

How much digestive secretion is produced daily from tissues into the lumen?

10 L / Day

1 L / Day

7 L / Day (correct)

5 L / Day

What is the primary function of the hepatic portal vein in the small intestine?

To transport absorbed substances to the liver (correct)

To absorb water and ions

To transport digestive enzymes

To mix chyme with digestive juices

Which of the following is NOT a characteristic of the large intestine?

Responsible for most of the digestion Signup and view all the answers

What is the primary mechanism of lipid absorption in the small intestine?

Diffusion Signup and view all the answers

What type of ions are secreted by the pancreas into the small intestine?

HCO3-, K+ Signup and view all the answers

What is the primary role of resident bacteria in the large intestine?

Breaking down remaining nutrients Signup and view all the answers

What type of movement occurs in the large intestine to facilitate the elimination of waste?

Mass movements Signup and view all the answers

What is the function of salivary amylase in the digestive process?

Beginning starch digestion Signup and view all the answers

What is the primary mechanism of water absorption in the large intestine?

Passive transport Signup and view all the answers

What is the function of the internal anal sphincter in the defecation process?

Relaxing to allow defecation Signup and view all the answers

What is the primary mechanism of mechanical digestion in the mouth?

Mixing of food by the tongue Signup and view all the answers

What is the primary function of enzymes in the digestive system?

To break down food molecules into their building blocks Signup and view all the answers

What is the process by which the end products of digestion are absorbed into the bloodstream or lymph?

Absorption Signup and view all the answers

What is the primary mechanism of control for digestive activity?

Reflexes via the parasympathetic division Signup and view all the answers

What is the result of the breakdown of carbohydrates during digestion?

Simple sugars Signup and view all the answers

What is the process by which the large intestine eliminates indigestible substances?

Defecation Signup and view all the answers