Lecture 6-Skeletal Muscle.pdf - Skeletal Muscle I Structure and Function Properties of Muscle Functions Movement Maintains posture Stabilizes joints

Lecture 6-Skeletal Muscle.pdf - Skeletal Muscle I Structure...

This preview shows page 1 - 11 out of 27 pages.

Skeletal Muscle I: Structure and Function
Image of page 1
Properties of Muscle Functions Movement Maintains posture Stabilizes joints Generates heat
Image of page 2
Properties of Muscle Functional Characteristics Excitability Contractility Extensibility Elasticity
Image of page 3
Skeletal muscle is neurogenic …so which part of the nervous system is involved?
Image of page 4
Remember the somatic branch of the PNS?
Image of page 5
Note: Nerve input
Image of page 6
Skeletal Muscle and nerves are organized into motor units Motor Unit – Neuron + all muscle fibers it innervates.
Image of page 7
What About Motor Units? Size of the motor unit is small in muscles over which we have high precision and low force control. A single motor neuron triggers fewer than 10 muscle fibers in the eye and fingers In contrast, a single motor unit is large in muscles that generate high force, low precision actions. A single motor neuron triggers 1000-2000 in the quadriceps, biceps and gastrocnemius
Image of page 8
The Neuromuscular Junction Muscle fiber Axon
Image of page 9
The Motor End Plate is the postsynaptic
Image of page 10
Image of page 11

You've reached the end of your free preview.

Want to read all 27 pages?

  • Fall '16
  • Gustafson

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

Stuck? We have tutors online 24/7 who can help you get unstuck.
A+ icon
Ask Expert Tutors You can ask You can ask You can ask (will expire )
Answers in as fast as 15 minutes
A+ icon
Ask Expert Tutors