Unit 1: Lecture 3 Self-study Flashcards
Smooth Muscle
walls of hollow viscera (GI tract, blood vessels)
innervation is via the autonomic nervous system.
Cardiac Muscle (myocardium)
no innervation is needed, except for regulation of rate, contractile strength
the myocardium has inherent contractility
Skeletal Muscle
40% of the body mass in normal adults and is the type of muscle attached to the skeleton for moving and supporting joints.
Muscle always ________ across a ________
pulls; joint
A muscle always pulls a joint through an ________
excursion
Prime Mover
main muscle used in specific muscular action
Synergist
assist the prime mover, and compliment its action
Fixator
immobilize a joint while another is activated
Antagonists
stabilize a joint while the opposite prime movers are contracting, thus preventing undesired actions (dislocation) during movement of the joint
Muscle fiber ::
muscle cell
Fibers are ___________, with ______ located at the periphery of the fiber (________ _________)
multinucleated; nuclei; syntactical arrangement
Epimysium (deep fascia)
the whole sheath around a muscle
consists of collagenous fibers
Tendon
relatively avascular structures which muscles use to attach to bone around the joint around which it wishes to move
Aponeurosis
(flat sheet of connective tissue)
attachment of muscles to each other
Unipennate
muscle fibers approach tendon from one side
