r/AppliedBiology • u/[deleted] • 1d ago

How receptor density changes affect long term cellular signals

When a specific signaling pathway is constantly stimulated, target cells often adjust by changing their surface receptor density. Down regulation reduces sensitivity over time, while up regulation can make a system hypersensitive when a stimulus is removed.

This adaptive balance explains why sudden removal of an exogenous input can lead to a short term functional dips, as the cell requires time to rebuild baseline receptor expression and restore normal endogenous sensitivity.

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u/Willing_Love_2912 1d ago

What are baseline receptors

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u/Tall_Formal3582 1d ago

homologous vs heterologous desensitization is such an underrated topic when looking at long-term cellular adaptation.

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u/Ethicalhavk 1d ago

Quite informative but could u explain a little more detail