Acetylcholine
acetycholinesterase
When a motor neuron ceases firing, the release of the neurotransmitter acetylcholine at the neuromuscular junction stops. As a result, the muscle fiber no longer receives the signal to contract, leading to the closure of ion channels and the cessation of action potentials in the muscle membrane. Consequently, calcium ions are actively pumped back into the sarcoplasmic reticulum, resulting in muscle relaxation. This process ultimately halts muscle stimulation and contraction.
Skeletal muscle contraction can be stopped by several mechanisms, including the depletion of calcium ions from the sarcoplasmic reticulum, which is necessary for the interaction between actin and myosin filaments. Additionally, the breakdown of acetylcholine in the synaptic cleft by the enzyme acetylcholinesterase halts the stimulation of muscle fibers. Finally, the removal of ATP, which is essential for muscle relaxation and the detachment of myosin from actin, also contributes to stopping contraction.
Rigor mortis, commonly referred to as "rigor," is caused by biochemical changes in muscle tissue after death. Following the cessation of blood circulation, ATP production halts, leading to a buildup of calcium ions in muscle cells. This causes muscles to stiffen as the actin and myosin filaments in the muscle fibers bind together without the energy needed to relax. Rigor mortis typically begins a few hours after death and can last for several days before the body starts to decompose.
oases
Halts
if it halts
The plural form of halt is halts.
The kinetic energy of the car becomes zero when the car halts. If it halts on top of a hill, the energy changes to potential energy.
just read the book and find out!
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Ends. (Also, halts, stops, finishes)