18 Questions
What happens to most fiber in the digestive tract?
It is broken down by bacterial enzymes in the large intestine.
Which organ uses short-chain fatty acids for energy?
Liver
Where does nutrient absorption primarily take place in the digestive system?
Small intestine
What role does fiber play in regulating bowel activity?
Holding water and adding bulk to stools
How does glucose primarily get absorbed in the small intestine?
Active transport across the intestinal lining
What is the main difference between lactose intolerance and milk allergy?
Milk allergy involves an immune response, while lactose intolerance affects sugar digestion
What is the role of fibers in the small intestine?
Fibers attract water, softening the stool for passage
What enzyme breaks down maltose into glucose + glucose in the small intestine?
Maltase
What happens to sugars and most starches within 1-4 hours after a meal?
They get digested, leaving only fibers in the digestive tract
Which enzyme breaks down lactose into galactose + glucose in the small intestine?
Lactase
What is the primary function of fibers in delaying gastric emptying?
To provide feeling of fullness and satiety
What is the final step in the digestion of disaccharides in the small intestine?
Hydrolyzing disaccharides into monosaccharides
What is the primary reason for the occurrence of lactose intolerance?
Insufficient lactase to digest glucose in milk
How does galactosemia differ from lactose intolerance?
In galactosemia, there is a lack of enzymes needed for further galactose metabolism, while lactose intolerance involves insufficient lactase.
Which organ is primarily affected by classic galactosemia?
Liver
What are the products of metabolism called?
Metabolites
Which sugar is broken down into glucose and galactose by the enzyme lactase?
Lactose
In individuals with galactosemia, what happens due to the diminished or missing enzymes for galactose metabolism?
Toxic levels of galactose 1-phosphate in tissues
Test your knowledge on lactose intolerance and galactosemia, common conditions related to the digestion of lactose and galactose sugars. Learn about symptoms, treatments, and dietary considerations for individuals with these conditions.
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