3 Questions
During prolonged low-intensity exercise lasting for more than 40-50 minutes, what is the major energy substrate for muscle?
Fatty acids
How can muscle cells obtain fatty acids?
Through uptake from blood
What is the first step in the process of fatty acids entering the mitochondria for β oxidation?
Conversion to acylcarnitine
Study Notes
Energy Substrate for Muscle During Prolonged Exercise
- During prolonged low-intensity exercise lasting for more than 40-50 minutes, the major energy substrate for muscle is fatty acids.
Fatty Acid Uptake by Muscle Cells
- Muscle cells can obtain fatty acids from the bloodstream, where they are bound to albumin.
- Fatty acids can also be released from stored triglycerides in adipose tissue.
Fatty Acid Entry into Mitochondria for β Oxidation
- The first step in the process of fatty acids entering the mitochondria for β oxidation is the activation of fatty acids to form acyl-CoA by the enzyme acyl-CoA synthase.
Test your knowledge on fatty acids and triglycerides with this quiz! Learn about their role as energy substrates for muscle cells and how they are stored and utilized during exercise.
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