1. Electrical Signals 2
BIOL 1407

3. Propagation of AP in Unmyelinated Axon

4. Saltatory Conduction

5. Chemical Synapses Junction between two neurons Chemical communication
Neurotransmitters

7. Receptors

9. Norepinephrine
Norepinephrine

10. Postsynaptic Potentials
Changes in membrane potential of the postsynaptic membrane
Receptors are chemically-gated channels
Graded potential

11. EPSPs EPSP = Excitatory PostSynaptic Potential Depolarization
Receptors are usually Na+ or Ca2+ channels

12. IPSPs IPSP = Inhibitory PostSynaptic Potential Hyperpolarization
Receptors are usually K+ or Cl- channels

13. Summation

14. Comparative Nervous Systems

15. Vertebrate Nervous System

16. Diencephalon
Brain Stem

17. Photo Credit: University of Wisconsin and Michigan State Comparative Mammalian Brain Collections and the National Museum of Health and Medicine, Wikimedia Commons

18. Picture Credit: Biodidac
Bird Brains
Bird brains are complex on inside, not on surface
PBS: Bird Brains
Video:
Pigeon Brain
Picture Credit: Biodidac

19. The End
Unless otherwise specified, all images in this presentation came from:
Campbell, et al Biology, 8th ed. Pearson Benjamin Cummings.