The answer is true idk how to explain its just true sometimes but its super rare
A Muscle Contraction Is Triggered When an Action Potential Travels Along the Nerves to the Muscles. Muscle contraction begins when the nervous system generates a signal. The signal, an impulse called an action potential, travels through a type of nerve cell called a motor neuron.
Mitochondria, plastids and chloroplast all are surrounded by a double membrane