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20 21 22 23 24 25 26 Most preganglionic neurons of the division of the ANS originate in the thoracic and lumbar regions of the spinal cord. A. Sympathetic B. Parasympathetic C. Somatosensory D. Somatomotor Striated muscles like skeletal muscle have repeating dark and light bands called striations. What fundamental unit of muscle contraction gives these muscles their striated appearance? A. Fascicles B. Tendons C. Transverse (T) tubules D. Sarcomeres The tension generated in a skeletal muscle fiber is directly proportional to the number of A. Thick and thin filaments present. B. Nebulin and titin molecules present. C. Crossbridges formed. D. Tropomyosin molecules present. In order for crossbridges to form in skeletal muscle, calcium must A. Bind to an enzyme that phosphorylates myosin. B. Phosphorylate tropomyosin to activate it. C. Bind to myosin to break down ATP. D. Bind to troponin to move tropomyosin. As ATP binds to the myosin head at the beginning of the contraction cycle, the myosin head immediately A. Releases actin. B. Initiates binding with actin. C. Pivots to pull acting filaments during the power stroke. D. Binds to tropomyosin. The contraction cycle is initiated by the rise in released from the sarcoplasmic reticulum (SR). A. Sodium ions B. Potassium ions C. Calcium ions D. Chloride ions is a "backup" energy molecule that can be rapidly converted to ATP in active skeletal muscle. A. Protein B. Glucose C. Fatty acid D. Phosphocreatine

20 21 22 23 24 25 26 Most preganglionic neurons of the division of the ANS originate in the thoracic and lumbar regions of the spinal cord. A. Sympathetic B. Parasympathetic C. Somatosensory D. Somatomotor Striated muscles like skeletal muscle have repeating dark and light bands called striations. What fundamental unit of muscle contraction gives these muscles their striated appearance? A. Fascicles B. Tendons C. Transverse (T) tubules D. Sarcomeres The tension generated in a skeletal muscle fiber is directly proportional to the number of A. Thick and thin filaments present. B. Nebulin and titin molecules present. C. Crossbridges formed. D. Tropomyosin molecules present. In order for crossbridges to form in skeletal muscle, calcium must A. Bind to an enzyme that phosphorylates myosin. B. Phosphorylate tropomyosin to activate it. C. Bind to myosin to break down ATP. D. Bind to troponin to move tropomyosin. As ATP binds to the myosin head at the beginning of the contraction cycle, the myosin head immediately A. Releases actin. B. Initiates binding with actin. C. Pivots to pull acting filaments during the power stroke. D. Binds to tropomyosin. The contraction cycle is initiated by the rise in released from the sarcoplasmic reticulum (SR). A. Sodium ions B. Potassium ions C. Calcium ions D. Chloride ions is a "backup" energy molecule that can be rapidly converted to ATP in active skeletal muscle. A. Protein B. Glucose C. Fatty acid D. Phosphocreatine

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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20 21 22 23 24 25 26 Most preganglionic neurons of the division of the ANS originate in the thoracic and lumbar regions of the spinal cord. A. Sympathetic B. Parasympathetic C. Somatosensory D. Somatomotor Striated muscles like skeletal muscle have repeating dark and light bands called striations. What fundamental unit of muscle contraction gives these muscles their striated appearance? A. Fascicles B. Tendons C. Transverse (T) tubules D. Sarcomeres The tension generated in a skeletal muscle fiber is directly proportional to the number of A. Thick and thin filaments present. B. Nebulin and titin molecules present. C. Crossbridges formed. D. Tropomyosin molecules present. In order for crossbridges to form in skeletal muscle, calcium must A. Bind to an enzyme that phosphorylates myosin. B. Phosphorylate tropomyosin to activate it. C. Bind to myosin to break down ATP. D. Bind to troponin to move tropomyosin. As ATP binds to the myosin head at the beginning of the contraction cycle, the myosin head immediately A. Releases actin. B. Initiates binding with actin. C. Pivots to pull acting filaments during the power stroke. D. Binds to tropomyosin. The contraction cycle is initiated by the rise in released from the sarcoplasmic reticulum (SR). A. Sodium ions B. Potassium ions C. Calcium ions D. Chloride ions is a "backup" energy molecule that can be rapidly converted to ATP in active skeletal muscle. A. Protein B. Glucose C. Fatty acid D. Phosphocreatine
Transcribed Image Text:20 21 22 23 24 25 26 Most preganglionic neurons of the division of the ANS originate in the thoracic and lumbar regions of the spinal cord. A. Sympathetic B. Parasympathetic C. Somatosensory D. Somatomotor Striated muscles like skeletal muscle have repeating dark and light bands called striations. What fundamental unit of muscle contraction gives these muscles their striated appearance? A. Fascicles B. Tendons C. Transverse (T) tubules D. Sarcomeres The tension generated in a skeletal muscle fiber is directly proportional to the number of A. Thick and thin filaments present. B. Nebulin and titin molecules present. C. Crossbridges formed. D. Tropomyosin molecules present. In order for crossbridges to form in skeletal muscle, calcium must A. Bind to an enzyme that phosphorylates myosin. B. Phosphorylate tropomyosin to activate it. C. Bind to myosin to break down ATP. D. Bind to troponin to move tropomyosin. As ATP binds to the myosin head at the beginning of the contraction cycle, the myosin head immediately A. Releases actin. B. Initiates binding with actin. C. Pivots to pull acting filaments during the power stroke. D. Binds to tropomyosin. The contraction cycle is initiated by the rise in released from the sarcoplasmic reticulum (SR). A. Sodium ions B. Potassium ions C. Calcium ions D. Chloride ions is a "backup" energy molecule that can be rapidly converted to ATP in active skeletal muscle. A. Protein B. Glucose C. Fatty acid D. Phosphocreatine
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