Lactic Acid

Definition

Lactic acid is a byproduct of anaerobic respiration, particularly in muscle cells when oxygen levels are low. It's what causes the burning sensation during intense exercise.

Related terms

Anaerobic Respiration:

This is the process by which cells produce energy without using oxygen. It results in the production of lactic acid or ethanol.

Glycolysis:

This is the first step in both aerobic and anaerobic respiration where glucose is broken down into pyruvate.

Pyruvate:

This is a key intersection in the network of metabolic pathways. Pyruvate can be converted into carbohydrates via gluconeogenesis, to fatty acids or energy through acetyl-CoA, to alanine via transamination, or to ethanol and CO2 by fermentation.