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Muscle Test SB
Muscle Test
| Question | Answer |
|---|---|
| What makes muscles unique? | Cells group together in embryo to form multinucleated tissue |
| What are muscles made of? | Fibers grouped together |
| What attaches the muscle to the bone? | Tendons |
| What is the sarcoplasmic reticulum? | A system around the fibers that releases Ca2+ when stimulated by a nerve impulse |
| What does the Ca2+ do to the muscle? | Changes the shape of the actin, allowing the myosin to bind to it. |
| How does the muscle contract? | Myosin binds to actin and pulls it toward the center of the section. |
| What is the case around the muscle fiber called? | Sarcolema |
| What is an individual fiber within a muscle fiber called? | Myofibril |
| What is the point where the muscle fiber's attach to the bone called? | Insertion point |
| What is the point where the tendon attaches the muscle to the bone? | Origin Point |
| What is the muscle that decreases the bending angle called? | Flexor |
| What is the muscle that increases the bending angle called? | Extensor |
| What causes muscle contractions? | Nerve signals cause a twitch |
| What causes a full muscle contraction? | Multiple signals |
| What is tetanus? | C. Tetani bacteria: Permanent muscle contraction |
| What does Ca2+ do to muscles? | Causes muscle contraction |
| What does K+ do to muscles? | Clears the system, relaxes muscles |
| What are slight, constant muscle contractions called? | Muscle tone |
| What is muscular dystrophy? | A genetic disorder that progressively weakens muscles |
| What is the most common type of muscle dystrophy? | Duchenne MS, found on X chromosome, wheelchaired by teens, usually death in twenties |
| What is aerobic exercise? | Exercise that increases the number of mitochondria and blood vessels in tissue, higher endurance |
| What is strength training? | Exercise that thickens muscle fibers, higher amounts of enzymes for glycolysis |
| What are steroids? | "Andro" steroids. Simulates hormone testosterone causing protein synthesis to rise. Also simulates hormone estrogen, can cause opposite gender side effects. |
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studybaldazo
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