The terminations are called end organs.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
Some snakes they allege are nerve-poisoners others as surely poison the blood, but with one solitary exception they assume the terminations of the motor-nerves and not the centres to be affected.
"On Snake-Poison: its Action and its Antidote"
A. Mueller
On the other hand, the rectangular chancel and western tower remained the favourite terminations of the parish church in England.
"The Ground Plan of the English Parish Church"
A. Hamilton Thompson