The relationship between a neurotransmitter and receptor is like a key and lock.

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The analogy of a key and lock is commonly used to describe the relationship between a neurotransmitter and receptor. The neurotransmitter acts like a key that fits into a specific receptor, like a lock, on the surface of a cell. When the key, or neurotransmitter, binds to its corresponding receptor, it triggers a series of biochemical reactions that result in a specific physiological response.

The Relationship Between a Neurotransmitter and Receptor Is Like a Key