What Causes Rigor Mortis

Question

What causes rigor mortis? A) lack of ATP in dead tissue B) cessation of action potentials after death C) lack of acetylcholine ACh) in dead tissue D) exhaustion of Ca²⁺from the sarcoplasmic reticulum

Accepted Answer

Rigor mortis occurs because, after death, the production of ATP stops, preventing muscle relaxation. This lack of ATP causes the muscles to become stiff.