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When calcium increases in the cytosol, what happens to tropnin and tropomyosin?
calcium ions bind to the troponin, changing its shape and altering the position of the tropomyosin
Rigor mortis is caused when what happens to calcium ions?
increase in membrane permeability to calcium ions
Apart from the 2 neurotransmitters, what else can cause muscle contraction?
hormones, stretching of smooth muscle fibers
What is the function of the intercalated disk?
help join cells and transmit the force of contraction from the cell to cell
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