Discuss Chapter 3 : Neurophysiology? The Structure and Functions of the Cells of the Nervous System

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Please, answer the following questions:

1. What are the different functions carried out by the macroglia and microglia?
2. What are the roles of the dendrites and dendritic spines, and what structural features enable them to carry out these functions?
3. How do diffusion and electrostatic pressure account for the chemical composition of intracellular and extracellular fluids when the neuron is at rest?
4. How do neurons signal stimulus intensity given that the action potential is all-or-none?

Reminder: 200 words answers for each question + one response to a peer.