Node of Ranvier is a very short gap between Schwann cells where myelinated axons are not covered in myelin so are exposed to tissue fluid.
Control and Coordination
The cell cycle is the sequence of events that takes place between one cell division and the next. It has three phases: interphase, nuclear division and cell division.
The Mitotic Cell Cycle
Antibiotic resistance arises by mutation and becomes widespread when antibiotics are overused.
Infectious Diseases
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