1. AP Biology
Nervous Systems
Part 1

2. Step 1: Reception

3. Step 2: Transduction

4. Step 3: Response

5. 150 mM KCl 150 mM NaCl –92 mV +62 mV Inner chamber Outer chamber Inner
Ions and Energy
–92 mV
+62 mV
Inner
chamber
Outer
chamber
Inner
chamber
Outer
chamber
150 mM
KCl
5 mM
KCl
15 mM
NaCl
150 mM
NaCl
Cl– K+
Na+
Cl–
Potassium
channel
Sodium
channel
Artificial
membrane

6. Evolution of a Nervous system in Animals

7. Overview of the Nervous System

8. CNS vs. PNS

9. Neuron structure

10. Synapse and Neurotransmitter

11. Glial Cells (Like a house frame … but for a brain

12. Schwann Cells OR Oligiodendrocytes
Nodes of Ranvier
Layers of myelin
Axon
Schwann
cell
Schwann
cell
Axon
Nodes of
Ranvier
Nucleus of
Schwann cell
Myelin sheath
0.1 µm