CHAPTER 9-10 – Muscles

Types of Muscle Tissue:

  • Describe the major functions of muscle tissue.

  • Identify skeletal, cardiac and smooth muscle.

  • Describe the structure, location in the body and function of skeletal, cardiac and smooth muscle.

  • Compare and contrast the characteristics of skeletal, cardiac and smooth muscle.

  • Compare and contrast the metabolism of skeletal, cardiac and smooth muscle.

        Overview of Muscles Panopto

Skeletal Muscle Tissue Anatomy:

  • Describe the organization of muscle tissue from cell to whole muscle to groups of muscles

  • Name the connective tissue layers that surround each cell, fascicle, muscle, and group of muscles and indicate the specific type of connective tissue that composes all of these layers.

  • Describe a skeletal muscle fiber including the transverse (T) tubules, sarcoplasmic reticulum and myofibrils.

  • Explain the organization of a myofibril.

  • Name, and describe the function of, each of the contractile, regulatory, and structural protein components of a sarcomere.

  • Describe the anatomy of the neuromuscular junction.

       Panopto on Macroanatomy of a Muscle

Skeletal Muscle Fiber Lecture by Kim Harrington

Panopto on Anatomy of a Muscle Fiber

Contraction of a Skeletal Muscle Fiber:

  • Explain how an electrical signal from the nervous system arrives at the neuromuscular junction.       

  • Describe, in order, the events that occur at the neuromuscular junction that elicit an action potential in the muscle fiber.        

        This series of videos from the text book:

 One and Two (IP)  on the neuromuscular junction

Neuromuscular Junction McGraw Hill

  • Explain the sliding filament theory of muscle contraction.

  • Describe the sequence of events involved in the contraction cycle of skeletal muscle.

  • Explain what is meant by the expression "excitation-contraction coupling".

  • List the sources of energy stored in a typical muscle fiber.

  • Describe the mechanisms that muscle fibers use to obtain ATP for muscle contraction.

  • Explain the factors that contribute to muscle fatigue.

        Panopto on contraction of a skeletal muscle fiber
Panopto on muscle metabolism
  • Summarize the events that occur during the recovery period of muscle contraction.

Skeletal Muscle Contraction:

  • Interpret a myogram of a twitch contraction with respect to the duration of the latent, contraction and relaxation periods and describe the events that occur in each period.

  • Define the terms tension and contraction, with respect to muscles.

  • Define the term motor unit.

  • Interpret a myogram or graph of tension vs. stimulus frequency and explain the physiological basis for the phenomena of treppe, summation and tetanus.

  • Interpret a myogram or graph of tension vs. stimulus intensity and explain the physiological basis for the phenomenon of recruitment.

  • Interpret a graph of the length-tension relationship and discuss the anatomical basis for that relationship.

  • Demonstrate isotonic and isometric contraction and interpret graphs of tension vs. time and muscle length vs. time for each type of contraction.

Muscle Anatomy

  • Explain how the name of a muscle can help identify its action, appearance, or location.

  • Define the terms prime mover (or agonist), antagonist, synergist and fixator.

  • Differentiate among the three classes of levers in terms of the relative position of fulcrum, effort and load, as well as in terms of the relative power and range of motion.

  • Give examples in the human body of muscles and their associated joints to illustrate each type of lever system.

                 Panopto on Muscle nomenclature