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Autonomic Nervous system

Autonomic Nervous system. Diego Gomez Marie Romero Raul Alvarado. Overview of nervous system. CNS VS. PNS. Central Nervous System. Brain Integrates sensory info Spinal cord Controls reflexes PNS to brain Neurons Carries impulses Microglia Support neural tissue.

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Autonomic Nervous system

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  1. Autonomic Nervous system Diego Gomez Marie Romero Raul Alvarado

  2. Overview of nervous system

  3. CNS VS. PNS

  4. Central Nervous System • Brain • Integrates sensory info • Spinal cord • Controls reflexes • PNS to brain • Neurons • Carries impulses • Microglia • Support neural tissue

  5. Peripheral Nervous System • Nerves that connect the CNS to the rest of the body • Schwann Cells • Forms segmented covering around axon • Neurons • Sensory • Motor

  6. Sensory & Motor Neurons • Motor neurons- carry signals from the CNS to the outer parts of your body • Ex: (muscles, skin, glands) • Sensory neurons-carry signals from the outer parts of your body into the CNS

  7. SOMATIC NERVOUS system • Voluntary • Made up of nerves that are connected to skin, muscles, and sensory organs • Controls skeletal muscles ex: muscle movement

  8. Autonomic Nervous System • Involuntary • Motor nervous system • Unconscious processes that maintain homeostasis • Controls/Regulates glands, blood vessels, internal organs and smooth muscle

  9. Reflex arc

  10. Reflex arc • Stimulus detected • Info through sensory neuron transmits receptor to spinal cord • Received at integration center, message then sent outward • Impulse from spinal cord to peripheral region • Effector receives impulse  lead to reflex • Somatic: the effector is skeletal muscle • Autonomic: effector is smooth muscle or cardiac muscle or visceral organs

  11. Reflex Arc • A reflex is a rapid involuntary response to stimulus • It is a pathway traveled by the nerve impulse during the reflex • Involuntary

  12. Autonomic Reflex Example • Baroreflex • Blood Pressure • Nerve transmission from baroreceptor to medulla initiate it • Vasoconstriction or vasodilation

  13. REFlex- Ans example

  14. Sympathetic vs. Parasympathetic

  15. Sympathetic (Fight or flight) Video

  16. Sympathetic vs. parasympathetic DIVSION

  17. Effects of Sympathetic Vs. Parasympathetic

  18. Neurotransmitters • A chemical message passed on from one neuron to another

  19. Receptors • What receives the neurotransmitters and accepts them • 2 receptors for ACH • NictonicACh receptors- found in pre and post ganglia PNS • Muscarinic ACh receptors- found at post ganglia in PNS • 4 receptors for Norepinephrine • Androgenic receptros • are found postsynaptically in target tissue where postganglionic sympathetic neurons terminate.

  20. Ganglion • Ganglion • Mass of neuron cell bodies • Outside of CNS • Pre-ganglionic fibers • Messages from CNS (spinal cord) to ganglion • ACH • Post-ganglionic fibers • Sends message from ganglion to targeted organ

  21. Ramus • White vs. Gray Ramus • White Ramus • Preganglionic sympathetic outflow • Gray Ramus • Short nerve containing postganglionic axons returning to spinal nerve

  22. Termination • NT binds to receptor • Must be removed • Happens through one or more processes • NT diffusion by breaking down • NT deactivated by enzymes • NT back into presynaptic axon terminal

  23. Bibliography • http://faculty.stcc.edu/AandP/AP/AP2pages/Units14to17/unit14/ans.htm • http://faculty.washington.edu/chudler/auto.html • http://www.ndrf.org/ans.html • http://faculty.washington.edu/chudler/synapse.html • http://faculty.stcc.edu/AandP/AP/AP2pages/Units14to17/unit14/sympathe.htm

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