meat tenderness Flashcards
how to describe carcass quality
lean
fat
bone
how to describe meat eating quality
tenderness
juiciness
flavour
how to describe nutritional quality
protein
fatty acids
minerals
other quality factors
spiritual quality
-halal, kosher
what is technological quality
functionality in processing application
what does technological quality start with
muscle physiology as modified by post mortem biochemical and structural changes and enzymatic activity
examples of technological quality
WHC, WBC = juiciness
what is meat
the muscle from an animal after going through rigor
rigor of a cattle
2 days
rigor of sheep/lamb
16 hrs
what happens during rigor mortis
significant, mechanical, physical, and biochemical changes occur
describe muscle tissue
highly ordered cellular structure that creates a fiber structure
how many proteins are in the fibrious structure of meat
3
what are the three proteins in fibrous structure of meat
sarcoplasmic proteins
connective tissue
myofibrillar protein
what are the main proteins that control tenderness
connective tissue
myofibrillar proteins
describe muscle structure
muscle->fibrils (fibre bundles)-> sacromere -> filaments
what does a sacromere consist of
actin and myosin filaments
name of three connective tissues/sheaths
endo, peri, epi
how do muscle contract in a dead animal
residual ATP + start anaerobic metabolism through glycolysis to produce pyruvate -> lactic acid
what does the thick fiilament consist of
myosin isoforms
what does the thin filament consist of
actin
troponin
tropomyosin
what protein do enzymes cut that result in improved tenderness during rigor
titin
what is rigor
stiffness
why is rigor muscle stiff
all sacromeres are contracted