Final answer:
Neurotransmitters are endogenous chemicals vital for transmitting signals across synapses. Their production is influenced by the foods we eat, our genes, and our experiences. Therefore, the correct answer to the question of how neurotransmitters are produced is 'd) All of the above'.
Step-by-step explanation:
Neurotransmitters are endogenous chemicals that are essential for neurotransmission, acting as chemical messengers to transmit signals across synapses from one neuron to another or to a target cell such as a muscle or gland cell. The production of neurotransmitters is a complex process and is influenced by various factors. One key factor is the foods we eat, as the nutrients we consume can be precursors to these chemical messengers. Our genes also play a role in the synthesis of neurotransmitters, as they provide the instructions for the enzymes and other proteins that are necessary for neurotransmitter production. Finally, our experiences can influence neurotransmitter levels, with certain experiences potentially stimulating or inhibiting neurotransmission. These three elements combined—foods, genes, and experiences—contribute to the production of neurotransmitters making the correct answer d) All of the above.