## **Biology Unit 3 Notes: A Comprehensive Overview of Exchange Processes and Transport Mechanisms** ### **Introduction** The marvel of life depends upon the constant movement of substances between cells and their environment. Whether it is the...

## Exchange Across Plasma Membranes Every living cell, no matter its role in the body—be it a humble root hair cell in a daffodil or a neuron in the human brain—depends on a delicate boundary: the plasma membrane. This fragile interface between...