How receptors work in the brain

Imagine the human body as a vast city full of buildings (cells). Each building has numerous special entrance doors (receptors) of various shapes and sizes. These doors aren't simple locks, but advanced and intelligent security systems (protein receptors).

This extended analogy illustrates the complexity and diversity of molecule-receptor interactions in the human body, covering concepts such as agonism, antagonism, selectivity, competition, and various mechanisms of cellular regulation and signaling.

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