Why is it that every axon in an adult mammal has a target cell ...

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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 2

Which hormone is released by the adrenal gland during stress?
 
  a. cortisol
  b. ACTH
 c. CRH
 d. NPY

[Yixagurpuldink]

Answer to Question 1

c

Answer to Question 2

a

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TYSM

[Alyson.hiatt@yahoo.com]

Thanks for the timely response, appreciate it