front 1 How much of the total body weight of the average adult is muscle tissue? | back 1 40-50% |
front 2 The different types of muscle tissue differ from each other by? | back 2 Microscopic anatomy, location, and type of control |
front 3 Which of the following is NOT a major function of muscle tissue? | back 3 Storing energy |
front 4 This is the property of muscle that gives it the ability to stretch without damage. | back 4 Extensibility |
front 5 Is an isometric contraction the muscle develops tension but does not? | back 5 Shorten |
front 6 This is a band of connective tissue that surrounds muscles | back 6 Epimysium |
front 7 When connective tissue extends as a broad flat layer, the tendon is referred to as | back 7 Aponeurosis |
front 8 For every nerve that penetrates a skeletal muscle there are general how many arteries and veins? | back 8 One artery and one or two veins |
front 9 Axon terminal clusters at the ends of neuromuscular junctions are referred to as: | back 9 Synaptic end bulbs |
front 10 After the fusion of myoblasts, the muscle fiber loses its ability to do what? | back 10 Grow, lengthen, contract, and go through mitosis |
front 11 The sequence that muscle action potentials must go through to excite a muscle cell | back 11 Myofibrils, myofilaments, mitochondria |
front 12 The mitochondria in muscle fiber are arranged | back 12 Closest to the sarcolemma |
front 13 These are the contractile organelles of the muscle fiber. | back 13 Myofibrils |
front 14 This is part of the skeletal muscle cell releases calcium when stimulated by the T-tubules. | back 14 Terminal cisterns of sarcoplasmic reticulum |
front 15 The sarcoplasmic reticulum is used for storing | back 15 Ca+ |
front 16 Which of the following contain thin filaments? | back 16 I band, A band, and H zone |
front 17 Which of the following contain thick filament? | back 17 Zone of overlap, A band, and H zone |
front 18 Myofibrils contain | back 18 Contractile proteins, regulatory proteins, and structural proteins |
front 19 Which of the following functions as a motor protein in all three types of muscle tissue? | back 19 Myosin |
front 20 What regulatory proteins can be found on an actin molecule? | back 20 Tropomyosin and Troponin |
front 21 Titin is found in a sarcomere | back 21 From M line to Z disc |
front 22 Which of the following is used to reinforce the sarcolemma? | back 22 Dystrophin |
front 23 In the sliding filament mechanism, the thin filament is being pulled towards the | back 23 M line |
front 24 The sarcoplasmic reticulum releases calcium ions into the cytosol | back 24 At the beginning of a contraction |
front 25 What energizes the myosin head? | back 25 ATP hydrolysis reaction |
front 26 What is needed for the contraction cycle to continue? | back 26 Ca, ATP, and ACh |
front 27 This results from a muscle action potential propagating along the sarcolemma and into the T tubules. | back 27 Excitation |
front 28 The signal to excite a muscle cell must cross the neuromuscular junction by the diffusion of acetylcholine across the | back 28 Synaptic cleft |
front 29 How many molecules of acetylcholine need to bind to open the ion channel of the ACh receptor? | back 29 10 |
front 30 How do muscles produce ATP? | back 30 Creatine phosphate, anaerobic cellular respiration, and aerobic cellular respiration |
front 31 Creatine phosphate and ATP together create enough energy for a muscle to contract for | back 31 15 seconds |
front 32 This consists of a somatic motor neuron plus all the skeletal muscle fibers it stimulates. | back 32 Motor unit |
front 33 This is a brief contraction of all muscle fibers in a motor unit in response to a single action potential. | back 33 Twitch contraction |
front 34 This is also referred to as the period of lost excitability | back 34 Refractory period |
front 35 A sustained contraction is | back 35 Tetanus |
front 36 Increasing the number of active motor units is called | back 36 Motor unit recruitment |
front 37 This is the least powerful type of muscle fiber. | back 37 Slow oxidative fiber |
front 38 Which of the below structures is found in cardiac muscle tissue but not skeletal muscle tissue? | back 38 Intercalated discs |
front 39 Which of the following exhibits autorhythmicity? | back 39 Cardiac muscle fibers |
front 40 Smooth muscle tone is due to the prolonged presence of what in the cytosol? | back 40 Calcium ions |
front 41 Hyperplasia is | back 41 An increase in the number of muscle fibers |