Answer:
The correct answer is A hormone local regulator synaptic signal.
Explanation:
Hormones are called chemical messengers because they carry chemical and biochemical information from one cell to another cell by a process called signal transduction.
The hormonal signal transduction is generally mediated by endocrine signaling in which hormone is secreted from one gland and then is transported via the blood stream to binds to the receptor present in the target cell.
