Chemicals by which nerve impulses transmit through one neuron by another are

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the chemicals that facilitate the transmission of nerve impulses from one neuron to another.

2. **Identifying the Chemicals**: The chemicals responsible for this transmission are known as neurotransmitters.

3. **Defining Neurotransmitters**: Neurotransmitters are often referred to as brain chemicals. Their primary function is to relay signals between neurons, allowing communication within the nervous system.

4. **Types of Neurotransmitters**: There are two main types of neurotransmitters:
- **Excitatory Neurotransmitters**: These neurotransmitters stimulate the brain and increase the likelihood of a neuron firing. Examples include:
- Dopamine
- Epinephrine
- **Inhibitory Neurotransmitters**: These neurotransmitters inhibit brain activity and decrease the likelihood of a neuron firing. An example is:
- Serotonin

5. **Conclusion**: Therefore, the answer to the question is that the chemicals by which nerve impulses transmit through one neuron to another are called neurotransmitters.

---