2024 CPPS 303 - Coupling of Nutrient Digestion & Absorption New Full Questions and Answers ( Included ) 100% Correct
- Can ingested food be readily absorbed?
Answer: No
- What Macro-nutrients require to be broken down (digested) by digestive
enzymes into manageable size before they can be absorbed?
Answer:
Carbohydrates Proteins Lipids
- What does the process of digesting macro-nutrients require?
Answer: A very specific digestion-absorption coupling mechanism
- A specific enzyme is required to digest...
Answer: a specific category of macro-nutrients
- Are transport channels involved universal or very specific?
Answer: usually very nutrient specific.
Selective for some parts of food and discriminates against others
- Where are carbohydrates, proteins and lipids absorbed?
Answer: In the small intestine
- Where is the highest rate of absorption for carbohydrates, proteins and lipids?
Answer: In the duodenum and jejunum
- Where are iron and folate absorbed?
Answer: duodenum
- Where is calcium absorbed?
Answer: small intestine
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- Where does the net absorption of bile acids (recycling) mainly occur?
Answer: In the distal jejunum, ileum, and ascending colon
- Where is Cobalamin (vitamin B12) absorbed?
Answer: In the ileum
- Does simple substrate require digestion?
Answer: No
- What kind of digestion do proteins require?
Answer: luminal and brush border digestion to convert protein into its constituents (amino acids)
- What kind of digestion do carbohydrates require?
Answer: luminal and brush bored digestion to convert polymers into monomers
- What kind of digestion does peptides require?
Answer: endocytosis and intracellular digestion
- What kind of digestion does lipids require?
Answer: luminal hydrolysis and intracellular resynthesis
- What are the two stages of carbohydrate digestion?
Answer: luminal and brush border enzymatic digestion
- What is luminal digestion of polysaccharides?
Answer: Luminal hydrolysis of digestible polysaccharides into oligosaccharides
(short polymer of saccharides with 2 to 10 monosaccharides)
- How does luminal hydrolysis break down polysaccharides?
Answer: By means of the salivary or pancreatic alpha-amylase
- What is roughly 45% to 60% of our dietary carbohydrates?
Answer: Starch
- What are starch and glycogen composed of?
Answer: amylose and amylopectin
- What does alpha-amylase, as an endoenzyme do?
Answer: hydrolyze internal al- pha-1, 4 linkages
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