Set: Muscle Anatomy and Physiology

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All 27 Terms

Term Definition
Sarcomere The smallest functional unit of muscle tissue
Myofibril A series of sarcomeres; several myofibrils are contained within one muscle fiber
Muscle Fiber One muscle tissue cell
Fascicle A bundle of muscle fibers
Titin Protein that connects m-line to z-line
Length-Tension Relationship The number of sarcomeres can change over time to optimize the length-tension relationship. This occurs in response to prolonged positions of stretching or shortening.
Active Insufficiency Muscles are not able to generate as much force in a shortened or lengthened position. Most noticeable in 2 joint muscles. Muscle contraction. Hamstrings and finger flexers
Passive Insufficiency Motion of a joint may be limited by the length of a 2 joint muscle because it's unable to stretch across both joints. Muscle stretch. Hamstrings and finger flexers
Strap Sartorius
Fusiform Biceps
Rhomboidal Rhomboids
Triangular Pectoralis Major
Unipennate Semimembranosis
Bipennate Dorsal Interossei
Multipennate Deltoid
Agonists Main muscle used to produce movement
Antagonist Muscles that oppose movement of agonist
Synergists Muscles that assist the action of the agonist brachioradialis
Fixators Muscles that stabilize proximally to allow the agonist to work effectively distally
Muscle Spindles Lie parallel to the muscle fibers
Golgi Tendon Organs Located in the tendon, both at the muscle origin and insertion
Paresis Muscles weakness/partial paralysis
Paralysis Complete loss of muscle function
Hemiplegia Partial/complete loss of muscle function on one side of the body (stroke)
Paraplegia Paralysis of all or some of the muscles of the trunk and lower extremities (spinal cord injury)
Tetraplegia/quadriplegia Paralysis of the trunk and lower extremities and some or all of the upper extremities
Atrophy Loss of muscle mass due to lack of use loss of innervation

Set Information

Terms 27
Creator amymayre
Created August 27, 2008
Groups None
Tag kinesiology
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  1. amymayre - 29 scores

Most Missed Words

  1. Fascicle → A bundle of muscle fibers - 1 miss
  2. Titin → Protein that connects m-line to z-line - 1 miss
  3. Length-Tension Relationship → The number of sarcomeres can change over time to optimize the length-tension relationship. This occurs in response to prolonged positions of stretching or shortening. - 1 miss
  4. Hemiplegia → Partial/complete loss of muscle function on one side of the body (stroke) - 1 miss
  5. Tetraplegia/quadriplegia → Paralysis of the trunk and lower extremities and some or all of the upper extremities - 1 miss