A chemical signal that has both endocrine and neural roles is:

Correct answer: A. Epinephrine

  • A. Epinephrine
  • B. Cortisol
  • C. Melatonin
  • D. Calcitonin

Explanation

The hormones epinephrine and norepinephrine are secreted from the adrenal medulla. They are emergency hormones released in condition of stress, emergency etc. Epinephrine and norepinephrine are also released by the adrenergic nerve fibres of the sympathetic nervous system where they act as neurotransmitters.

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