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What is the basic order of events in the digestion and mobilization of dietary fats?
- a)Degradation by lipases→ emulsified by bile→ incorporation into chylomicrons→ absorption and conversion into triacylglycerols
- b)Degradation by lipases→ absorption and conversion into triacylglycerols→incorporation into chylomicrons→ emulsified by bile
- c)Emulsified by bile→ degradation by lipases→ absorption and conversion into triacylglycerols→ incorporation into chylomicrons
- d)Emulsified by bile→ incorporation into chylomicrons→ absorption and conversion into triacylglycerols→ degradation by lipases
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
What is the basic order of events in the digestion and mobilization of...
The digestion and mobilization of dietary fats involve several steps. First, bile salts are released into the small intestine, where they emulsify dietary fats, breaking them down into smaller droplets. This emulsification process increases the surface area of the fat droplets, allowing lipases to act upon them more efficiently. Lipases then degrade the triglycerides into free fatty acids and monoglycerides. These smaller components are absorbed by the intestinal cells and converted back into triglycerides. The newly formed triglycerides are then incorporated into chylomicrons, which are large lipoprotein particles. Finally, the chylomicrons are released into the lymphatic system and eventually enter the bloodstream, where they transport the dietary fats to various tissues for utilization or storage.
Most Upvoted Answer
What is the basic order of events in the digestion and mobilization of...
Understanding the Digestion and Mobilization of Dietary Fats
The process of digesting dietary fats involves several key steps, and option 'C' correctly outlines the sequence of events:
1. Emulsification by Bile
- Dietary fats, primarily triglycerides, are hydrophobic and cannot be digested efficiently in their original form.
- Bile salts, produced in the liver and stored in the gallbladder, are released into the small intestine after a meal.
- These bile salts emulsify fats, breaking them into smaller droplets, which increases the surface area for enzyme action.
2. Degradation by Lipases
- Once emulsified, pancreatic lipases are secreted into the small intestine.
- These enzymes break down triglycerides into free fatty acids and monoglycerides, making them easier to absorb.
3. Absorption and Conversion into Triacylglycerols
- The fatty acids and monoglycerides produced through lipase action are absorbed by intestinal epithelial cells.
- Inside these cells, they are reassembled into triglycerides (triacylglycerols) for transport.
4. Incorporation into Chylomicrons
- The newly formed triglycerides are packaged with cholesterol, phospholipids, and proteins to form chylomicrons.
- Chylomicrons are lipoprotein particles that facilitate the transport of fats through the lymphatic system and into the bloodstream.
Conclusion
The correct sequence underscores the importance of emulsification for efficient fat digestion, followed by degradation, absorption, and transport. Understanding these steps is crucial for comprehending how dietary fats are processed in the body.
The process of digesting dietary fats involves several key steps, and option 'C' correctly outlines the sequence of events:
1. Emulsification by Bile
- Dietary fats, primarily triglycerides, are hydrophobic and cannot be digested efficiently in their original form.
- Bile salts, produced in the liver and stored in the gallbladder, are released into the small intestine after a meal.
- These bile salts emulsify fats, breaking them into smaller droplets, which increases the surface area for enzyme action.
2. Degradation by Lipases
- Once emulsified, pancreatic lipases are secreted into the small intestine.
- These enzymes break down triglycerides into free fatty acids and monoglycerides, making them easier to absorb.
3. Absorption and Conversion into Triacylglycerols
- The fatty acids and monoglycerides produced through lipase action are absorbed by intestinal epithelial cells.
- Inside these cells, they are reassembled into triglycerides (triacylglycerols) for transport.
4. Incorporation into Chylomicrons
- The newly formed triglycerides are packaged with cholesterol, phospholipids, and proteins to form chylomicrons.
- Chylomicrons are lipoprotein particles that facilitate the transport of fats through the lymphatic system and into the bloodstream.
Conclusion
The correct sequence underscores the importance of emulsification for efficient fat digestion, followed by degradation, absorption, and transport. Understanding these steps is crucial for comprehending how dietary fats are processed in the body.
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Question Description
What is the basic order of events in the digestion and mobilization of dietary fats?a)Degradation by lipases→ emulsified by bile→ incorporation into chylomicrons→ absorption and conversion into triacylglycerolsb)Degradation by lipases→ absorption and conversion into triacylglycerols→incorporation into chylomicrons→ emulsified by bilec)Emulsified by bile→ degradation by lipases→ absorption and conversion into triacylglycerols→ incorporation into chylomicronsd)Emulsified by bile→ incorporation into chylomicrons→ absorption and conversion into triacylglycerols→ degradation by lipasesCorrect answer is option 'C'. Can you explain this answer? for MCAT 2025 is part of MCAT preparation. The Question and answers have been prepared according to the MCAT exam syllabus. Information about What is the basic order of events in the digestion and mobilization of dietary fats?a)Degradation by lipases→ emulsified by bile→ incorporation into chylomicrons→ absorption and conversion into triacylglycerolsb)Degradation by lipases→ absorption and conversion into triacylglycerols→incorporation into chylomicrons→ emulsified by bilec)Emulsified by bile→ degradation by lipases→ absorption and conversion into triacylglycerols→ incorporation into chylomicronsd)Emulsified by bile→ incorporation into chylomicrons→ absorption and conversion into triacylglycerols→ degradation by lipasesCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for MCAT 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for What is the basic order of events in the digestion and mobilization of dietary fats?a)Degradation by lipases→ emulsified by bile→ incorporation into chylomicrons→ absorption and conversion into triacylglycerolsb)Degradation by lipases→ absorption and conversion into triacylglycerols→incorporation into chylomicrons→ emulsified by bilec)Emulsified by bile→ degradation by lipases→ absorption and conversion into triacylglycerols→ incorporation into chylomicronsd)Emulsified by bile→ incorporation into chylomicrons→ absorption and conversion into triacylglycerols→ degradation by lipasesCorrect answer is option 'C'. Can you explain this answer?.
What is the basic order of events in the digestion and mobilization of dietary fats?a)Degradation by lipases→ emulsified by bile→ incorporation into chylomicrons→ absorption and conversion into triacylglycerolsb)Degradation by lipases→ absorption and conversion into triacylglycerols→incorporation into chylomicrons→ emulsified by bilec)Emulsified by bile→ degradation by lipases→ absorption and conversion into triacylglycerols→ incorporation into chylomicronsd)Emulsified by bile→ incorporation into chylomicrons→ absorption and conversion into triacylglycerols→ degradation by lipasesCorrect answer is option 'C'. Can you explain this answer? for MCAT 2025 is part of MCAT preparation. The Question and answers have been prepared according to the MCAT exam syllabus. Information about What is the basic order of events in the digestion and mobilization of dietary fats?a)Degradation by lipases→ emulsified by bile→ incorporation into chylomicrons→ absorption and conversion into triacylglycerolsb)Degradation by lipases→ absorption and conversion into triacylglycerols→incorporation into chylomicrons→ emulsified by bilec)Emulsified by bile→ degradation by lipases→ absorption and conversion into triacylglycerols→ incorporation into chylomicronsd)Emulsified by bile→ incorporation into chylomicrons→ absorption and conversion into triacylglycerols→ degradation by lipasesCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for MCAT 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for What is the basic order of events in the digestion and mobilization of dietary fats?a)Degradation by lipases→ emulsified by bile→ incorporation into chylomicrons→ absorption and conversion into triacylglycerolsb)Degradation by lipases→ absorption and conversion into triacylglycerols→incorporation into chylomicrons→ emulsified by bilec)Emulsified by bile→ degradation by lipases→ absorption and conversion into triacylglycerols→ incorporation into chylomicronsd)Emulsified by bile→ incorporation into chylomicrons→ absorption and conversion into triacylglycerols→ degradation by lipasesCorrect answer is option 'C'. Can you explain this answer?.
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