Why is it that every axon in an adult mammal has a target cell (muscle cell or other neuron) with which it makes synaptic contact?
A) Each target cell causes the growth of a neuron and its axon.
B) After formation, axons release a chemical that causes a target cell to form.
C) Axons that fail to find a target cell die.
D) An axon will make contact with any kind of cell and adjust its function as necessary.

Question

Quizplus · Accepted Answer

During development, axons that fail to find a target cell undergo programmed cell death (apoptosis) via a process known as neuronal pruning. This is important for the proper wiring of the nervous system and ensures that each neuron makes appropriate synaptic connections. Therefore, every axon in an adult mammal has a specific target cell due to the elimination of those that fail to establish synaptic contact during development.

Why Is It That Every Axon in an Adult Mammal