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Questions and Answers
Through what bodily structures do chylomicrons and LDLs ultimately enter the bloodstream?
Through what bodily structures do chylomicrons and LDLs ultimately enter the bloodstream?
- Lymph vessels (correct)
- Capillaries
- Arteries
- Alveoli
What is the primary function of muscle cells when they receive fats from chylomicrons?
What is the primary function of muscle cells when they receive fats from chylomicrons?
- Storage
- Production of bile
- Transport to other cells
- Oxidation for energy (correct)
What happens to LDL particles after they are picked up by liver cells?
What happens to LDL particles after they are picked up by liver cells?
- Converted to HDL
- Broken down into glucose
- Stored, secreted in bile, or repackaged (correct)
- Used for the synthesis of steroid hormones
Which process primarily takes place in the small intestine?
Which process primarily takes place in the small intestine?
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What is a specific use of cholesterol by specialized cells?
What is a specific use of cholesterol by specialized cells?
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Study Notes
Lipoprotein Transport
- Chylomicrons and LDLs are secreted into lymph vessels and enter the bloodstream through ducts in the chest.
- Chylomicrons are gradually broken down, releasing fatty acids to cells.
- Fatty acids are used by muscle cells for energy production or stored by fat cells.
- LDL particles are taken up by liver cells, where cholesterol is stored, secreted in bile, or repackaged for delivery to other body cells.
- Cholesterol is used by all cells for synthesizing cell membranes.
- Specialized cells utilize cholesterol for producing steroid hormones.
Intestinal Absorption
- The small intestine is the primary site for absorbing water, sodium, and other substances.
- The large intestine plays a secondary role in absorption.
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