eccentric contraction
shortening of the muscle (tension exceeds load)
isometric contraction
a muscle twitch
ACh
aerobic pathway
direct phosphorylation
t tubule
SR foot proteins
regulates intracellular Ca2+ levels
overlap
an action potential along the sarcolemma leads ti sliding of the myofilaments
1. motor neurons stop firing, no more ACh is released
2. action potential along t-tubule and sarcolemma stop
3. voltage across membrane returns to rest
4. Ca2+ channels on SR close
5. [Ca2+] drops, Ca2+ goes back to SR via active transport
6. cross bridges cant form, no more contractions
period of contraction
period of contraction and relaxation
latent period
the strength of the 1st observable muscle contraction