first step in releasing the energy of glucose, in which a molecule of glucose is broken into two molecules of pyruvic acid
The three-carbon end product of glycolysis. Pyruvate is the raw material of the Krebs cycle.
Produced in muscle cells from the reduction of pyruvate (under anaerobic conditions) to regenerate NAD+ so that glycolysis can continue. A rise in lactic acid usually accompanies an increase in physical activity.
second stage of cellular respiration, in which pyruvic acid is broken down into carbon dioxide in a series of energy-extracting reactions
Electron Transport Chain
a series of proteins in which the high-energy electrons from the Krebs cycle are used to convert ADP into ATP
in eukaryotic cells, the cell organelle that is surrounded by two membranes and that is the site of cellular respiration, which produces ATP. Where Kreb's Cycle and Electron Transport Chain occur
cellular respiration that uses oxygen, sequentially releasing energy and storing it in ATP