Muscle Bio Notes 10:30:17.docx

Muscle Bio Notes 10:30:17.docx - The more motor neurons the...

Info icon This preview shows pages 1–2. Sign up to view the full content.

The more motor neurons the more control of that muscle The less motor neurons per more motor fibers = less control Twitch o Single stimulus contraction relaxation sequence Eye muscles have a lot of motor neurons for very few muscle fibers Twitch Phases o Latent Period Action potential sweeps across sarcolemma Contraction has not begun yet SR releases calcium ions No tension Neurotransmitter has reached a receptor o Contraction Phase Cross bridging Tension rises to peak A lot of muscle and not a lot of nerve = takes longer for calcium to combine with troponin ex. Calf muscle o Relation Phase Acetocholyne removed from synapse Calcium pumped back into sarcoplasmic reticulum Calcium levels fall Active sites covered by tropomyosin Number od cross bridges decline with detachment Absolute and relative refractory period nothing will get muscle to twitch again unless other stimulus given is stronger than original
Image of page 1

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

Image of page 2
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