Chapter 10- Muscle Tissue Choose the best answer to each of the following questions. 1) How does muscle tissue contribute to homeostasis? A) by generating heat that helps maintain body temperature B) by moving materials through the body C) by pulling on bones to move the body D) A and B are correct. E) A‚ B and C are correct. 2) The primary function of muscle is A) conversion of chemical energy into mechanical energy. B) conversion of chemical energy into radiant energy. C) conversion
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First‚ an electrical impulse or action potential from the central nervous system triggers a muscle contraction. When this happens‚ acetylcholine (ACH) serves as a neurotransmitter‚ sending the signal to the neuromuscular junction. The impulse is then propagated down the sarcolemma and through the t-tubules. As this signal travels down the t-tubules‚ Calcium (Ca2+) is released from the sarcoplasmic reticulum to the sarcomere‚ one unit of contraction with actin and myosin
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A healthy‚ 25-year-old male receives intravenous succinylcholine and inhaled halothane for anesthesia induction; this patient experiences muscle rigidity‚ tachycardia‚ and a fast rise in his body temperature during a surgical procedure. Since the symptoms of this patient are identical to symptoms of malignant hyperthermia‚ the leading diagnosis of this patient is malignant hyperthermia‚ a pharmacogenetic disorder that involves hyperthermia‚ tachycardia‚ and hypermetabolic reactions of skeletal muscles
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Organization of Muscle Tissue Laszlo Vass‚ Ed.D. Version 42-0016-00-01 Lab Report Assistant This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions‚ diagrams if needed‚ and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this information in an editable file which can be sent to an instructor. Purpose:
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Introduction: Skeletal muscle cells are specialized cells that contain multinucleated muscle fibers called myocytes. These myocytes contain thicker fibers that facilitate the release of calcium‚ the generation of an action potential within the sarcolemma‚ and the subsequent production of a muscle contraction. Muscle contractions are a direct byproduct of motor unit recruitment‚ and for this lab we can examine these effects with aid of a finger pulse transducer and a bar stimulus electrode. The
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which the most excitable axons reach firing threshold. True 11. The relative refractory period roughly coincides with the period of action potential after hyperpolarisation. True 12. Intracellular fluid is sub extracellular fluid. True 13. The neuromuscular junction (NMJ) is a synapse. true 14. The action potential in skeletal muscle travels through the muscle via T-tubules true 15. Ca2+ is essential for normal contraction of skeletal muscle. true 16. A twitch of one skeletal muscle fibre is an example
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Type 2 is Idiopathic adolescent scoliosis of the thoracic and/or lumbar spine in which correction and fusions could be needed. Type 3 is Secondary adult curves. This is divided in to types A and B. A‚ being neuromuscular and congenital scoliosis‚ or asymmetrical anomalies at lumbosacral junction. B is involves metabolic bone diseases such as osteoporosis and asymmetric arthritic disease along with vertebral fractures (Aebi‚ 2005). The treatment of lumbar scoliosis in adolescents has new and developing
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Ca floods into cell through T-tubules at uniform and fast rate Ca signals contraction Triads - t tubes with sarcoplasmic recticulum (also high in Ca) on each side‚ SR is resirvior for Ca Ca comes in from SR & T-tubule Motor Unit & Neuromuscular Junction 22.1.2 Skeletal muscles are all innervated by somatic nerves‚ conscious control Neuron goes directly to the muscle and onnervateds it Motor unit is a single axon and all the muscle fibers it innervates Short distance from terminal of
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Myasthenia gravis (MG) Myasthenia gravis is an autoimmune disease which results from antibodies that block acetylcholine receptors at the neuromuscular junction. This prevents nerve impulses from triggering muscle contractions. The most commonly affected muscles are those of the eyes‚ face‚ and swallowing. It can result in double vision‚ dropping eye leads‚ trouble talking‚ and trouble walking. Diagnosis can be supported by blood tests for specific antibodies‚ the edrophonium test‚ or nerve conduction
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Bones to Muscles – How Do We Move? Author Note This Bones to Muscles- How Do We Move Assignment is being submitted on October 27th‚ 2013 for Heather Heck’s Section 21 Structure and Function of the Human Body Class. 1. Bone is a very active tissue. Please explain the pathway of how the bone cells get nutrients and oxygen from the blood vessels using the following terms: Periosteum‚ endosteum‚ lacunae‚ lamellae‚ canaliculi‚ perforating canals‚ osteon‚ Haversian
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