Name the body parts that act as first line of defence

The nervous system interacts with the endocrine system by a. using hormones as connections b. sending nerve impulses directly to glands c. using neuroendocrine cells as connections d. sending neurotransmitters directly to neurons

Which description provides the best objective summary of the article in the passage?

Qué sucede cuando una persona tiene muy poco o demasiado costeroides?