Exercise Physiology | Fatty Acid Metabolism

The video discusses the entry and metabolism of glucose and fatty acids in skeletal muscle cells. It highlights the efficiency of glucose metabolism compared to fatty acids, explaining the pathways involved in each process. The video also touches on how exercise intensity affects the choice of energy source, with glucose being more efficient at higher intensities.

What is the primary focus of the video tutorial?

• Detailed pathways of glucose metabolism

• Comparison of glucose and fatty acid metabolism

• Introduction to protein synthesis

• Overview of cellular respiration

How does glucose enter the muscle cell?

• Through simple diffusion

• Through endocytosis

• Via a glucose transporter

• By active transport

What is the end product of glycolysis?

• Acetyl CoA

• Lactate

• Glucose-6-phosphate

• Pyruvate

Which enzyme is responsible for converting pyruvate to acetyl CoA?

• Lactate dehydrogenase

• Pyruvate dehydrogenase

• Hexokinase

• Citrate synthase

What is the role of fatty acid transporters like CD36?

• To convert fatty acids to glucose

• To oxidize fatty acids

• To transport fatty acids into the sarcoplasm

• To synthesize fatty acids

What is the function of carnitine in fatty acid metabolism?

• To transport fatty acids into the mitochondrial matrix

• To oxidize fatty acids

• To convert fatty acids to glucose

• To synthesize fatty acids

Which process occurs in the mitochondrial matrix during fatty acid metabolism?

• Beta-oxidation

• Fermentation

• Pentose phosphate pathway

• Glycolysis

What is a key difference between glucose and fatty acid metabolism?

• Fatty acid metabolism requires fewer enzymes

• Glucose metabolism is more efficient

• Fatty acid metabolism is faster

• Glucose metabolism is less efficient

During high-intensity exercise, which energy source is predominantly used?

• Fatty acids

• Proteins

• Nucleic acids

• Glucose

What happens to the reliance on energy sources as exercise intensity increases?

• Increased reliance on fatty acids

• Increased reliance on glucose

• Decreased reliance on glucose

• Decreased reliance on proteins