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Nissil Bodies

Nissil Bodies. Axon Hillock . Motor Neuron. Schwann Cell. Functional Classification 1. Sensory (afferent) 2. Motor (efferent) 3. Interneurons • Conducts action potentials from periphery to CNS • Transmits action potentials from CNS to periphery • Impulses to effectors

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Nissil Bodies

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  1. Nissil Bodies

  2. Axon Hillock

  3. Motor Neuron

  4. Schwann Cell

  5. Functional Classification 1. Sensory (afferent) 2. Motor (efferent) 3. Interneurons • Conducts action potentials from periphery to CNS • Transmits action potentials from CNS to periphery • Impulses to effectors • Completely within CNS • Transmits action potentials from one part of CNS to another part of CNS

  6. Neuroglia

  7. Neuroglia CNS Oligodendrocyte- Forms Myelin Astrocyte- Promote blood brain barrier, nourish neuron, strengthen. "mommy" Ependymal- Produce cerebrospinal fluid, form blood brain barrier Microglia- Phagocytize bacteria

  8. Neuroglia PNS Schwann Cell- Myelin Satellite Cell- nourish and support (The mommy for the PNS)

  9. Disorders of the Neuroglia Amyotrophic Lateral Sclerosis/ Lou Gehrig's- Astrocyte's secrete toxins that destroy neurons Hungtington's- Microglia secretes toxins destroying neurons

  10. Membrane Potential

  11. Membrane Potential

  12. Membrane Potential

  13. Measuring the Action Potential

  14. http://highered.mcgraw-hill.com/sites/0073525707/student_view0/chapter10/voltage-gated_channels_and_the_action_potential.htmlhttp://highered.mcgraw-hill.com/sites/0073525707/student_view0/chapter10/voltage-gated_channels_and_the_action_potential.html

  15. Neurotransmitters +30 or more types Acetylcholine – stimulates skeletal muscle contractions Monoamines Norepinephrine Dopamine Norepinephrine & Dopamine generate a sense of well-being in CNS Amphetamines increases levels of dopamine & Norepinephrine Amino Acids GABA General Inhibitory neurotransmitter in CNS Opens Cl- channels, Cl- influx hyperpolarizes cell Some Anesthesia enhance GABA secretions Schizophrenia – associated with GABA deficiency Gas Nitric Oxide (NO) Vasodilator Released during sexual arousal Viagra prolongs the presence of NO

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