201-L36-elecpropnerv-2009ND slides

201-L36-elecpropnerv-2009ND slides - I Neuronal Tissue Two...

Info icon This preview shows pages 1–11. Sign up to view the full content.

View Full Document Right Arrow Icon
I. Neuronal Tissue A. Nerve Cells (Neurons) Involved in the generation and interpretation of ‘Electrical Signals’ B. Glial Cells Support neuronal cell activity Two cell types:
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Dendrites Cell Body Axon Synapses collect information process information propagate info transmit info
Image of page 2
“Bioelectricity” Resting Membrane Potential Action Potential
Image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
II. ‘Resting Membrane Potential’ Baseline electrical condition (of ALL cells) Depends on 2 parameters A. Transmembrane Ion Gradients (particularly Na + & K + ) B. Membrane Permeability to those ions
Image of page 4
A - = negatively charged protein and phosphate
Image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
A. Ion Gradients Na,K-ATPase develops and maintains steady-state ion gradients for ALL cells Na + Na + K + K + B. Permeability ATP K + ‘leak’ channels present in ALL cells
Image of page 6
K + K + (+) (-) Channel Cytoplasm Outside
Image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
2 opposing forces Chemical & Electrical 1) Chemical force (K + gradient) Tends to ‘push’ K + out 2) Developed Electrical Force (inside negative) Tends to ‘pull’ K + in
Image of page 8
Na + Na + K + K + ATP (+) (-) ‘K + leak channel’ cyto out
Image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
In a ‘Typical’ cell
Image of page 10
Image of page 11
This is the end of the preview. Sign up to access the rest of the 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