Upload
cameran-clark
View
44
Download
1
Tags:
Embed Size (px)
DESCRIPTION
Electrical Signals 2. BIOL 1407. Propagation of AP in Unmyelinated Axon. Saltatory Conduction. Chemical Synapses. Junction between two neurons Chemical communication Neurotransmitters. Receptors. Norepinephrine. Norepinephrine. Postsynaptic Potentials. - PowerPoint PPT Presentation
Citation preview
Electrical Signals 2
BIOL 1407
Propagation of AP in
Unmyelinated Axon
Saltatory Conduction
Chemical Synapses
• Junction between two neurons
• Chemical communication
• Neurotransmitters
Receptors
Norepinephrine Norepinephrine
Postsynaptic Potentials
• Changes in membrane potential of the postsynaptic membrane
• Receptors are chemically-gated channels
• Graded potential
EPSPs
• EPSP = Excitatory PostSynaptic Potential
• Depolarization• Receptors are usually
Na+ or Ca2+ channels
IPSPs
• IPSP = Inhibitory PostSynaptic Potential
• Hyperpolarization• Receptors are usually
K+ or Cl- channels
Summation
Comparative Nervous Systems
Vertebrate Nervous System
Brain Stem
Diencephalon
Photo Credit: University of Wisconsin and Michigan State Comparative Mammalian Brain Collections and the National Museum of Health and Medicine, Wikimedia Commons
Bird Brains
• Bird brains are complex on inside, not on surface
• PBS: Bird Brains• http://www.pbs.org/wgbh/
nova/sciencenow/3214/03-brain.html
• Video: http://www.youtube.com/watch?v=BGPGknpq3e0
Pigeon BrainPicture Credit: Biodidac
The End
Unless otherwise specified, all images in this presentation came from:
Campbell, et al. 2008. Biology, 8th ed. Pearson Benjamin Cummings.