Multiple Choice
Gallstone surgery sometimes requires that the gallbladder be removed. Patients are then advised to avoid ingesting large amounts of fat because __________.
39. Digestive System
Digestion
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Researchers provided radioactively labeled food to a dog and traced the movement of absorbed molecules. Which type of molecule moved along a path different from all the others?
A
Carbohydrates
B
Proteins
C
Nucleic acids
D
All followed the same pathway.
E
Fats
Verified step by step guidance1
Understand that the problem involves tracing the movement of different types of molecules in a biological system, specifically within a dog.
Recall that carbohydrates, proteins, and nucleic acids are typically absorbed into the bloodstream and transported to cells throughout the body via the circulatory system.
Recognize that fats, unlike the other molecules, are absorbed differently. They are first emulsified by bile salts in the small intestine, then absorbed into the lymphatic system as chylomicrons before eventually entering the bloodstream.
Identify that the unique pathway of fats involves the lymphatic system, which is distinct from the direct absorption into the bloodstream seen with carbohydrates, proteins, and nucleic acids.
Conclude that fats move along a different path compared to carbohydrates, proteins, and nucleic acids, which all follow a more direct route through the circulatory system.
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