a muscle cell dies, so that there is no atp left in the sarcoplasm. however, there is lots of ca2 in the sarcoplasm. this results in:

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04-11-2022
Biology

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a muscle cell dies, so that there is no atp left in the sarcoplasm. however, there is lots of ca2 in the sarcoplasm. this results in:

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kjuli1766 kjuli1766 · Answer 1 · 2022-11-09T06:43:56-05:00

The calcium ions can't be pumped back into the endoplasmic reticulum, as calcium remains in the cell cytoplasm, troponin molecules can not return to occupy active sites of actin.

Myosin heads are not released from active sites i.e. the muscle fiber stays contracted. Contracted muscles cause rigor mortis which sets in within a couple of hours of death. It lasts for days in freezing cold conditions; but in tropical condition, body putrefies as necrosis of cells, as well as microbial decomposition, starts after 24 to 36 hours of death.

The sarcoplasm plays a critical position in muscle contraction as an increase in Ca2+ attention in the sarcoplasm begins the technique of filament sliding. A decrease in Ca2+ in the sarcoplasm eventually ceases filament sliding. The sarcoplasm also aids in pH and ion stability within muscle cells.

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