Bioenergetics and Exercising Muscle - Part 2

Vocabulary flashcards covering key terms and concepts from the bioenergetics of exercise lecture.

Bioenergetics

The study of energy flow through living systems.

Oxidative capacity

The ability of muscle to utilize oxygen to produce energy.

ATP-PCr system

An energy system that supplies immediate ATP through the breakdown of phosphocreatine.

Anaerobic glycolysis

A metabolic pathway that produces ATP without oxygen, converting glucose into pyruvate.

Krebs Cycle

A series of enzymatic reactions in the mitochondria that produce ATP and electron carriers.

Electron transport chain (ETC)

A series of protein complexes in the mitochondrial membrane that use electrons to create a proton gradient for ATP synthesis.

Oxidative phosphorylation

The process of ATP production that occurs in the mitochondria using oxygen as the final electron acceptor.

Free Fatty Acids (FFA)

The primary form of fat used in energy metabolism after being released from triglycerides.

Lactate

A byproduct of anaerobic metabolism, often produced during intense exercise.

Cori Cycle

The process by which lactate is converted to glucose in the liver.

Fiber type

Muscle fibers can be classified into Type I (slow-twitch) and Type II (fast-twitch), each with different metabolic capacities.

Substrates for energy production

The primary materials (glucose, fats, proteins) used to generate ATP.

Rate-limiting enzyme

An enzyme that regulates the rate of a metabolic pathway, controlling the speed of the reaction.

Lipid oxidation

The process by which fats are broken down for energy production.

Glycolysis

The metabolic pathway that converts glucose into pyruvate, yielding ATP.

Acetyl-CoA

A key intermediate in energy metabolism that enters the Krebs cycle.

NADH and FADH2

Electron carriers that transport electrons to the electron transport chain.

Oxygen requirements

Intensity of exercise increases oxygen demand, affecting ATP production.