Pregnancy Pool Exercises

For the triglyceride molecule to provide energy for muscular contraction, it must first be broken into its free-fatty-acid and glycerol components by the action of a specific biological catalyst, the enzyme triglyceride lipase. The free-fatty-acid molecules are then able to enter the bloodstream and travel to the muscle mitochondria where they are used as an important energy fuel.

The liver uses the glycerol molecules to produce new glucose units in a metabolic process known as gluconeogenesis. Both these processes are important in providing energy during prolonged exercise, in particular during marathon and ultramarathon racing.

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Also noExercises in the electron microscopic picture in Exercises 1.2 are the clumps of fine granular material scattered throughout the cell. These granules are the second important form of intramuscular energy stores, comprising many individual glucose molecules bound together into long branching chains called glycogen. Glycogen is the only form in which both muscles and the liver store the carbohydrates eaten in the diet. As we shall see, these glycogen stores play a critical role in determining performance in marathon and ultramarathon races.

In vegeExercisess and fruits, carbohydrates are stored as a different polymer starch. Starch and its derivatives, in particular a short-chain polymer known as carbohydrate or glucose polymer, may have a special role in carbohydrate loading and fuel ingestion during exercise, a point that is discussed in greater detail in post 4.

With this background, we can now discuss the more detailed structure of the thick and thin filaments and how they interact to produce muscular contraction.

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