Podcast
Questions and Answers
What is the main purpose of digestion?
What is the main purpose of digestion?
- To absorb nutrients into the bloodstream
- To store food in the stomach
- To break down food into particles small enough to cross the cellular barrier of the GI system (correct)
- To eliminate waste products from the body
What occurs during the process of digestion?
What occurs during the process of digestion?
- Food is absorbed into the bloodstream
- Food is stored in the stomach for later use
- Food is eliminated from the body as waste
- Food is broken down into particles small enough to cross the cellular barrier (correct)
Where does the broken-down food from digestion ultimately go?
Where does the broken-down food from digestion ultimately go?
- The pancreas for secretion of enzymes
- The kidneys for filtration
- The circulation to be carried around the body (correct)
- The liver for processing
What is the term for the process of taking in and utilizing nutrients from food?
What is the term for the process of taking in and utilizing nutrients from food?
What is GI primarily responsible for?
What is GI primarily responsible for?
What is the result of ineffective digestion?
What is the result of ineffective digestion?
What is the purpose of breaking down food into small particles?
What is the purpose of breaking down food into small particles?
What happens to the broken-down food particles after GI?
What happens to the broken-down food particles after GI?
What is the ultimate destination of the absorbed nutrients after GI?
What is the ultimate destination of the absorbed nutrients after GI?
What is the significance of GI in the overall digestive process?
What is the significance of GI in the overall digestive process?
Where does a small amount of absorption take place?
Where does a small amount of absorption take place?
What is the role of protease and pepsin enzymes in the digestion of proteins?
What is the role of protease and pepsin enzymes in the digestion of proteins?
What percentage of absorption is thought to occur in the mouth?
What percentage of absorption is thought to occur in the mouth?
Where does most of the absorption occur?
Where does most of the absorption occur?
Where does the digestion of proteins take place?
Where does the digestion of proteins take place?
What is involved in the absorption process in the stomach and small intestine?
What is involved in the absorption process in the stomach and small intestine?
What is the end product of protein digestion?
What is the end product of protein digestion?
What type of enzymes are protease and pepsin?
What type of enzymes are protease and pepsin?
What is the role of microorganisms in the digestive system?
What is the role of microorganisms in the digestive system?
What is the location of the enzyme that breaks down proteins into amino acids?
What is the location of the enzyme that breaks down proteins into amino acids?
What is the primary function of lipase in the pancreas?
What is the primary function of lipase in the pancreas?
What is the approximate amount of water absorbed by the GI tract daily?
What is the approximate amount of water absorbed by the GI tract daily?
What is the primary function of the GI tract in relation to water and minerals?
What is the primary function of the GI tract in relation to water and minerals?
What is the approximate amount of water present in feces?
What is the approximate amount of water present in feces?
What is the result of the action of lipase on fats?
What is the result of the action of lipase on fats?
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Study Notes
Digestion and Absorption
- A small amount of absorption is thought to take place in the mouth
- 10% of absorption occurs in the stomach and small intestine with the help of microorganisms
Steps of Digestion and Absorption
- Digestion is the breakdown of food into particles small enough to cross the cellular barrier of the gastrointestinal (GI) system and be carried around the body in the circulation
- Digestion occurs through:
- Breakdown of proteins in the stomach with the help of protease and pepsin enzymes into amino acids
- Breakdown of fats into small particles of fatty acids and glycerol by pancreatic lipase in the small intestine
- Absorption of nutrients into the bloodstream through the walls of the small intestine
Water and Minerals
- The GI tract absorbs around 9L of water per day
- Only 100-200 mL of water is present in feces
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