The Muscles of a Recently Deceased Human Can Remain in a Contracted

question 67

Multiple Choice

The muscles of a recently deceased human can remain in a contracted state, termed rigor mortis, for several hours, due to the lack of

• A) phosphorylated myosin.
• B) ATP needed to break actin-myosin bonds.
• C) calcium ions needed to bind to troponin.
• D) oxygen supplies needed for myoglobin.
• E) sodium ions needed to fire action potentials.

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