![]() Causes "tender points" on the body in specific places on the neck, shoulders, back, hips, arms, and legs. Low force high endurance Cramps A muscle cramp is a sudden and involuntary contraction of one or more of your muscles Fibromalgia -disorder that causes muscle pain and fatigue High force low endurance Slow-twitch -Muscle fibers contract slowly Tetanus rapid stimuli causes sustained contraction which does not relax, leading to painful contractions, usually in the jaw or neck muscles, potentially deadly Muscle twitch marked by small muscle contractions in the body Fast-twitch -Muscle fibers contract quicklyÄepends on Anaerobic Metabolism (Glycolytic) for energy or rigor mortis, stiffening of the muscles after death Myogoblin functions as an oxygen-storage unit, providing oxygen to the working muscles. results in muscle contraction weakening and causing cramping Physiological fatigue -insufficient ATP supply Lactic acid is produced faster than it is removed results from worry, stress, boredom, overwhelm Muscle fatigue -ATP supply is depleted faster than it is produced experienced in yoga Concentric shortening of the muscle during flexion (ex: bulging of the bicep when lifting weight) - produced by the agonist Eccentric lengthening of the muscle during extension - produced by antagonist Psychological fatigue -muscle is able to contract Complement the prime mover actions to make a more effective movement Contractibility the ability of skeletal muscle to shorten by force Excitability the ability of skeletal muscle to respond to stimuli Extensibility the ability of skeletal muscle to be stretched Elasticity the ability of skeletal muscle to recoil back to its original length after being stretched Epimysium membrane that surrounds a bundle of muscles Perimysium membrane that surrounds a bundle of muscle fascicle, contains motor neurons and blood vessels Endomysium membrane that surrounds a bundle of muscle cell or muscle fiber Sarcoplasm muscle cell cytoplasm Myofibril assist in contraction of the muscle Actin thin filaments Myosin Thick filament Sarcomere regular arrangement of myofibrils Isotonic Consists of concentric and eccentric contractions Isometric -maintaining joint angle but increasing workload Synergists -Muscles that contract at the same time as the prime mover During elbow flexion the triceps must relax to allow the movement to take place. Ex: Muscles in front and back of leg stabilize muscle when standing Antagonists a muscle which opposes the movement. Agonists may be prime movers or assisting muscles. Agonists a muscle which contracts to produce the movement. Insertion the end of the muscle attaching to the freely moving bone of its joint. ![]() Works long period of time Cardiac muscle cell Skeletal muscle cell Smooth muscle cell Tendon and Aponeurosis Attaches muscle to bone Origin or head of muscle the point at which it attaches to a bone (usually) or another muscle. Strongest muscle Smooth/Visceral muscle -Found in organs, blood vessels, and glands Over 400 muscles Cardiac muscle -Attached to heart ![]() Constriction of organs and vessels Helps digest food, transport nutrients, water, and blood throughout the body Heartbeat Allows heart to beat and pump blood Skeletal muscle -Attached to bones The only muscle that never tires is our () heart Body Movement Contraction of skeletal muscles allows us to walk, run, talk, or manipulate objects Maintenance of posture Gives structure to the body with help of bones Respiration Allows lungs and thorax to move for breathing Production of body heat Contraction of muscles gives off heat needed for maintaining body temperature Communication Allows us to speak, write, type, and make gestures.
0 Comments
Leave a Reply. |