Answer:
neurotransmitters
Explanation:
Neurotransmitters: The term neurotransmitter is referred to as a chemical messenger in an individual's body which is responsible for transmitting various signals from specific nerve cells to the target cells and therefore the target cells can be present anywhere inside the body including glands, muscles, and other specific nerves.
It is responsible for carrying, balancing, and boosting the signals between different cells or nerves. It is responsible for affecting both the psychological and the physical functioning of an individual, for example, fear, appetite, sleep, mood, and heart rate etc.
In the question above, the given statement represents the neurotransmitter.