Final answer:
The correct answer is d) neurotransmitters, which are chemicals used by nerve cells to communicate. They transmit signals between neurons and play crucial roles in various functions in the body. Examples include dopamine, serotonin, and acetylcholine.
Explanation:
Chemicals Made by Nerve Cells
The correct answer to the question is d) neurotransmitters. Neurotransmitters are chemical messengers that transmit signals across a synapse from one neuron (nerve cell) to another target neuron, muscle cell, or gland cell. This process is essential for communication within the nervous system, enabling a wide variety of functions such as movement, mood regulation, and sensory perception.
Some well-known examples of neurotransmitters include:
- Dopamine - involved in reward and pleasure pathways.
- Serotonin - regulates mood, sleep, and appetite.
- Acetylcholine - plays a key role in muscle movement and memory.
In contrast, the other options in the question represent different substances or classes of drugs that do not fit the description of how nerve cells communicate.
Learn more about neurotransmitters here:
https://brainly.com/question/51103111