Lesson Objective

Describe the components of a signal transduction pathway and explain how the binding of a ligand to a receptor initiates a cellular response.

How is a chemical signal outside a cell converted into a specific functional response inside the cell?

What determines whether a signaling molecule (ligand) binds to an intracellular receptor versus a membrane-bound receptor?

4.2- Introduction to Signal Transduction

There is a molecular bridge between a cell's exterior environment and its interior operations. It allows for a generic chemical signal outside a cell to cause a highly specific structural change inside the cell.

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Unit 4 Test