Peripheral - cell body in autonomic ganglion •...

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Peripheral/Autonomic Nervous Systems peripheral nervous system - nerves, ganglia nerve - collections of axons (myelinated/unmyelinated) o separates into motor/sensory parts at origin o dorsal root - sensory axons o ventral root - motor axons ganglia - groups of neuron cell bodies outside the central nervous system o dorsal root ganglia - contains cell bodies of sensory neurons o motor neuron cell bodies found inside spinal cord somatic motor neurons stimulate skeletal muscles to contract o for each muscle stimulated to contract, its antagonist must be inhibited by hyperpolarizing the motor neuron autonomic nervous system - contains sympathetic/parasympathetic areas, medulla oblongata autonomic neurons control smooth muscles, cardiac muscles, glands medulla oblongata - controls the system 2 neurons used for each pathway (1 has cell body in central nervous system, other has
Image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: cell body in autonomic ganglion) • preganglionic neuron- 1st neuron, releases Ach at synapse • postganglionic neuron- releases Ach in parasympathetic division, norepinephrine in sympathetic division • sympathetic division- stimulates the adrenal gland to secrete epinephrine o prepares the body for fight or flight o norepinephrine released at postganglionic neuron synapses • parasympathetic division- slows down heart, increases secretions o regulates organs by releasing Ach o ACh causes G proteins to open up ion channels >> hyperpolarization >> slows down cell neuroglia- cells that support neurons • supplies neurons w/ nutrients, gets rid of waste, provides immunity • Schwann cells - produce myelin sheaths in peripheral nervous system • oligodendrocytes - produce myelin sheaths in central nervous system...
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern