In a fitness program, the slogan "use it or lose it" describes Reversibility.
Its release when it has a phosphate group removed
The parasympathetic nervous system is characterized by the location preganglionic neurons and the short postganglionic axons near the organs they innervate. The preganglionic neurons would originate in the spinal cord or the brainstem while the postganglionic neurons would lie outside the CNS.
Fungi does consists body of a tangled web of filaments