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muscles MTI
muscle overview
Question | Answer |
---|---|
Antagonist | Opposes action of another muscle. |
Prime Mover | primary actor in movement |
Synergist | acts w/another muscle to produce movement |
Muscles are identified by: | location, size, action, shape |
Frontalis | raises eyebrows |
Zygomaticus | makes us smile |
Latissimus dorsi | provides extention, adduction and rotation of the arm inwardly. |
Triceps Brachii | extends the arm at the elbow |
Diaphragm | seperates the thoracic cavity from the abdominal cavity |
Rectus Abdominus | flexes vertebral column and compresses the abdominal wall |
Gastrocnemius | flexes the foot and aids in moving the body foward |
Atrophy | wasting of muscles due to disease over a long period of time |
Fibromyalgia | widespread musculoskeletal pain and fatigue disorder |
Muscular Dystrophy | MD genetic disorder weakness and degeneration of skeletal muscle |
Myasthenia gravis | CHRONIC neuromuscular disease |
Sprain | injury to a ligament |
Strain | injury to a muscle or a tendon |
Muscular system functions | movement, tonicity, heat production, stability |
Fascia | connective tissue held together by a fibrous sheath called... |
Muscles must.... | ...be supplied with proper oxygen and nutrition to perform properly |
Muscles are composed of | 75% water, 20% protien, 5% carbs, lipids, and salts |
3 types of muscle tissue | Cardiac, smooth, skeletal |
Skeletal muscles | allow movement by being attached to bones, voluntary |
Smooth muscles | found in digestive, bladder, involuntary |
Cardiac muscle | quadrangular, cross striated, heart |
how many different muscles are there | 600 |
Epimysium | thin covering which surrounds muscle |
Muscles are attached to bone | by tendons |
Aponeuroses | wide thin sheet-like tendon that attached muscle to muscle |
Perimysium | responsible for dividing muscles into sections called fasicles |
Endomysium | covering made up of connective tissue that surrounds individual muscle cell |
Origin | site of attachment to bone that is more fixed or still |
Insertion | site of attachment to a bone that moves |