chapter 11: physiology of the muscular system
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36 terms
Terms | Definitions |
|---|---|
 Functions of muscular tissue: | movement heat production and posture |
| the skeletal muscle fiber characteristic of excitability directly results in these scells being capable of | responding to nerve signals |
| largest to smalles skeletal muscle cells | fiber,myofibril, myofilamnet |
| Troponin and tropomyosin are | myofilament proteins |
| the contractile unit of a myofibirl is the | sarcomere |
| the chief function of the T Tuble is | to allow the electrical signal to move deep into cell |
| myosin heads are alsp called | cross bridges |
| during muscle contraction, ca++ is released from | sarcoplasmic reticulum |
| te region of a muscle fiber where a motor neuron connects to the muscle fiber | motor end-plate |
| myosin | thick myofilament |
| actin | thin myofilament |
| Actin, troponin, and tropomyosin are present on the | thin myofilament |
| The i band resides within | a single sarcomere |
| principle components of a motor unit | one somatic motor neuron, the muscle fibers supplied by a somatic motor neuron |
| staircase phenomenon | treppe |
| Muscle strength remains _______ in isometric contractions | constant |
| physiological muscle fatigue is cause by | relative lack of ATP |
| increase in muscle sixe is ` | hypertrophy |
| Endurance training is also called | aerobic training |
| Isotonic contraction | tone in muscle remains the same, length changes |
| Located in the walls of digestive tract | smooth |
| contains many nuclei near the sarcolemma | skeletal |
| voluntary | skeletal |
| not striated | smooth |
| striated, contains a single nucleus | cardiac |
| a principal function: peristalsis | smooth |
| has larger t tubules that form diads with sarcoplasmic reticulum | cardiac |
| movement of bones, heat production, and posture | skeletal |
| intercalated disks | cardiac |
| poorly developed SR | smoooth |
| Muscle strains are characterized by | myalgia |
| Crush injuries can cause | myoglobin to accumulate in the bllod, kidney failur |
| A viral infection of the nerves that control skeletal muscle movement is | poliomyelitis |
| genetic diseases characterized by atrophy of skeletal muscle tissues | muscular dystrophy |
| Myasthenia gravis | autoimmune diseas in whihc the immune system attacks muscle cells at the neuromuscular junction |
| tetanus | smooth contained muscle contraction |
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