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shorter endurance (white meat)
more capillaries per mass of fibers (more myoglobin)
1) brain signals motorneuron
2) neuron and muscle meet
3) neurotransmitters are released
4) calcium ions diffuse into cytoplasm
5) calcium bonds to troponin (changes shape)
6) myosin attaches to actin and bends
7) more ATP comes in and releases
in step 6, what is the process of bending?
-ADP+P are attached to the heads
-ADP+P are released when it moves and then it bends
-no oxygen>no ATP>no immediate contraction
-sets in 2 or so hours after death (can last 72)
-membrane permeability increases and causes calcium ions to flood in, and cross bridge attachment occurs
an enzyme decomposes any acetylcholine
-ATP sends Ca ions back into sarcoplasmic reticulum; ATP breaks the fiber link
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