In human muscle cells, the fermentation process produces lactic acid and adenosine triphosphate. Lactic acid fermentation occurs usually during physical activity, when less oxygen reaches the cells, so the cells adjust by producing energy that doesn't require oxygen in the process.Continue Reading
Glucose, made up of sugar molecules, is an important energy source for humans. When the body needs energy, this glucose breaks down in a process called glycolysis and results in pyruvate molecules and NADH molecules. When there is a lack of oxygen, lactic acid fermentation uses the pyruvate molecules that have accumulated during glycolysis and the NADH molecules to produce energy for human muscle cells. Lactic acid and ATP, or adenosine triphosphate, are the byproducts of this process. While ATP is a compound that provides energy, the lactic acid is a waste product.
Because lactic acid can harm the muscles, once the physical activity declines, a person experiences rapid breathing. This immediately adds oxygen to the lactic acid to convert it back to harmless pyruvate molecules. A sign of a lack of oxygen for glycolysis and high lactic acid in the muscles is muscle pain and fatigue. As the high-energy exercise continues, the lactic acid builds up, and the pH drops.Learn more about Muscles
Lactose-fermenting bacteria are those that consume lactose or other six-carbon sugars and metabolize them through the process of lactic acid fermentation. This process of fermentation releases the energy contained within the bonds of the sugars and produces the byproduct lactic acid. Lactic acid fermentation is a common capability of a wide variety of bacteria.Full Answer >
Muscle cells belong to one of three types: skeletal, cardiac or smooth muscle, according to InnerBody. All muscles cells are essential in allowing movement of the body and its organs.Full Answer >
Charts identifying muscles and showing their locations within the human body are available from PTDirect.com and InnerBody.com. SportsInjuryClinic.Net provides a brief description of several major muscles, in addition to showing their locations within the body.Full Answer >
The stapedius muscle is the smallest striped muscle in the human body that has the ability to contract, claims a 2007 study in the Polish Journal of Otorhinolaryngology. The stapedius muscle automatically contracts as a result of aural stimulation.Full Answer >