PSE reduces the meat's water-holding capacity.

Study for the 68R Veterinary Food Inspection Specialist Exam. Utilize flashcards and multiple choice questions, each with hints and explanations. Prepare confidently for your exam!

Multiple Choice

PSE reduces the meat's water-holding capacity.

PSE reduces the meat's water-holding capacity because the rapid postmortem drop in pH while the muscle is still warm causes proteins to denature and lose their ability to bind water. This rapid glycolysis produces lactic acid, lowering pH to around 5.5 when heat is still present, leading to structural changes in myofibrillar proteins that squeeze water out of the muscle. The result is less water retained within the tissue, more drip and purge, and a pale, soft, exudative appearance. So the effect described is the decrease in water-holding capacity. An increase in water holding would require intact protein structure and appropriate pH, a no-effect scenario wouldn’t match the observed changes, and increasing fat content isn’t directly related to the muscle proteins’ water-binding.

PSE reduces the meat's water-holding capacity because the rapid postmortem drop in pH while the muscle is still warm causes proteins to denature and lose their ability to bind water. This rapid glycolysis produces lactic acid, lowering pH to around 5.5 when heat is still present, leading to structural changes in myofibrillar proteins that squeeze water out of the muscle. The result is less water retained within the tissue, more drip and purge, and a pale, soft, exudative appearance. So the effect described is the decrease in water-holding capacity. An increase in water holding would require intact protein structure and appropriate pH, a no-effect scenario wouldn’t match the observed changes, and increasing fat content isn’t directly related to the muscle proteins’ water-binding.

More practice questions