ANSC 2340 Lecture Notes - Veal, Myocyte, Sarcomere
10 Apr 2013
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Document Summary
Blood is lost from the circulatory system: loss of transportation: Myoglobin (stores o2: supply of o2 in muscle depends on amount of myoglobin and muscle fiber type. Loss of the two methods of heat through lungs and skin (heat transported via blood) Anaerobic metabolism post mortem: glycogen in glycolysis used. Continues until glycogen is depleted or lactic acid accumulates. Glycogen stores vary depending on the animal was handled, and other stress factors: glycogen generally makes up 1% of muscle. Build up of lactic acid = protein denaturation: lactic acid remains in cell cannot be removed. Lowers ph inactivates glycolytic enzymes: anaerobic metabolism stopped, production of. Causes protein denaturation: affects muscle"s ability to hold water. Too much or too lactate can be produced. Influenced by glycogen levels at slaughter and rate of lactic acid production. Problem with autolysis enzymatic machinery start degrading things. When o2 available (in live animal): aerobic metabolism can continue.
