17 Questions
What is the primary means of moving food through the small intestine?
Peristalsis
How much digestive secretion is produced daily from tissues into the lumen?
7 L / Day
What is the primary function of the hepatic portal vein in the small intestine?
To transport absorbed substances to the liver
Which of the following is NOT a characteristic of the large intestine?
Responsible for most of the digestion
What is the primary mechanism of lipid absorption in the small intestine?
Diffusion
What type of ions are secreted by the pancreas into the small intestine?
HCO3-, K+
What is the primary role of resident bacteria in the large intestine?
Breaking down remaining nutrients
What type of movement occurs in the large intestine to facilitate the elimination of waste?
Mass movements
What is the function of salivary amylase in the digestive process?
Beginning starch digestion
What is the primary mechanism of water absorption in the large intestine?
Passive transport
What is the function of the internal anal sphincter in the defecation process?
Relaxing to allow defecation
What is the primary mechanism of mechanical digestion in the mouth?
Mixing of food by the tongue
What is the primary function of enzymes in the digestive system?
To break down food molecules into their building blocks
What is the process by which the end products of digestion are absorbed into the bloodstream or lymph?
Absorption
What is the primary mechanism of control for digestive activity?
Reflexes via the parasympathetic division
What is the result of the breakdown of carbohydrates during digestion?
Simple sugars
What is the process by which the large intestine eliminates indigestible substances?
Defecation
Test your understanding of the process of chemical digestion and absorption in the small intestine, including the role of active transport and diffusion in the absorption of nutrients. Learn about the transportation of end products to the liver through the hepatic portal vein and lymph.
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