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Chapter 8
| Question | Answer |
|---|---|
| Characteristics of Skeletal muscle | Attached to bones, straited, voluntary, and limited capacity |
| Characteristics of Cardiac muscle | found only in the heart, straited, involuntart, and can regenerate under certain conditions |
| Characteristics of Smooth muscle | In the walls of hollow internal structures, helps digestion, nonstraited, involuntary, and has large capacity to regenerate |
| Function of fascia | the term is applied to a sheet or broad band of fibrous connective tissue or around other muscles/organs |
| Composition and function of tendon | a cord of dense regular connective tissue composed of parallel bundels of collegen fibers |
| Function of sacrolemma and t-tubule | each muscle fiber is surrounded by sarcolemma (Flesh sheets) and t-tubules (tunnel like extentions of sarcolemma) |
| Function of myofibril | Cylindrical structures that extends along the entire length of muscle fibers |
| Function of actin, tropomysin, and troponin | Actin (protein) join together to form actin filiment thats twisted into a helix, contains myosin-binding site. the other 2 cover the myosin building sites |
| The parts of neuromuscular junction | synaptic cleft, sarcolemma, myfibril, axon terminal, synaptic end bulb, nerve impulse, synaptic cesicle containing acetycholine, motor end plate |
| 5 events that happen at an NMJ | Release of ACh, Activation of ACh receptors, Generates muscle action potential, Break down of ACh |
| Events that cause contraction and relaxation in skeletal muscle fiber | Contaction: ATP splits, Forms crossbrideges, power stroke binding ATP and detaching. Relaxation: neurotransmitter ACh is rapidly broken down by enzyme acetcholinesterase |
| Cause of Ducheyenne and Becker Muscle dystrophy | mutations in the DMD gene |
| Definition of cramp and causes | rapid uncontrolled contraction (spasm)caused by prolonged exercise, dehydration, metabolic disorder, or myotonin |
| Causes and symptoms of Fibromyalgia | Causes are not really known but believed to be physical or emotional trauma,sleep disturbances,or infection. symptoms are chronic neck and back pain, fatigue, depression, lyme disease, or sleep disorders |
| Source of pain in shin splints and their cause | flat feet, overuse, or small hairline fractures located in the tibia regon |
| Symptoms of a muscle strain | swelling, bruising or redness, pain at rest, weakness of muscle or tendons, or inability to use |
| Sources of pain in tendon inflamation and the cause | pain, swollen, redness. caused by overuse or trauma |
| Symptoms of myasthenia gravis | difficulty breathing, difficulty swolloing or chewing, difficulty talking, drooping head, fatigue |
| 5 functions of muscular tissue | 1. Produces body movements 2. Stabilizing body position 3. regulating organ volume 4. Moving substances within the body 5. producing heat |
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