ANIMAL REPRODUCTIVE PHYSIOLOGYadvanced
Explain the difference between the neurotransmitter signaling described in the slides and pheromone communication.
Answer
A neurotransmitter transmits a chemical signal across a synapse from one neuron to a target neuron. A pheromone carries chemical information from one individual to another member of the same species. The first is described as neuron-to-neuron signaling at a synapse; the second is intraspecific communication between individuals.
Explanation
The key distinction is the **signaling context and target**. A neurotransmitter is defined by transmission across a synapse from one neuron to another target neuron. A pheromone is defined by information transfer between individuals of the same species. Both involve chemical signals, but they are not interchangeable terms because their described routes and recipients differ.\n\n**Key takeaway:** Neurotransmitters signal between neurons; pheromones signal between members of a species.\n\n**Glossary:** **Synapse**: Junction crossed in neuronal signaling; **intraspecific**: Between members of the same species; **pheromone**: Chemical signal used in such communication.
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