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IV. Sequence of Events: Muscle Contraction See if you can place the events that occur during muscle contraction and relaxation in their proper order. Insert numbers in the spaces provided to order the events in the proper sequence. A. An electrical impulse travels over the sarcolemma and inward along the T tubules, causing sacs in the sarcoplasmic reticulum to release calciurn. B. The release of ACh stops and acetylcholinesterase breaks down any remaining ACh. C. Troponin and tropomyosin prevent the myosin heads from grasping the thin filament, and the muscle fiber relaxes. D. An electrical impulse causes small vesicles at the end of a motor neuron to bind with the cell wall and release the neurotransmitter acetylcholine (ACh). E. Calcium binds with the troponin on the actin filament, exposing attachment points. F. ACh diffuses across the synaptic cleft, where it stimulates receptors in the sarcolemma. G. Calcium ions are pumped back into the sarcoplasmic reticulum. H. The myosin heads of the thick filaments grab onto the thin filaments and muscle contraction occurs.

IV. Sequence of Events: Muscle Contraction See if you can place the events that occur during muscle contraction and relaxation in their proper order. Insert numbers in the spaces provided to order the events in the proper sequence. A. An electrical impulse travels over the sarcolemma and inward along the T tubules, causing sacs in the sarcoplasmic reticulum to release calciurn. B. The release of ACh stops and acetylcholinesterase breaks down any remaining ACh. C. Troponin and tropomyosin prevent the myosin heads from grasping the thin filament, and the muscle fiber relaxes. D. An electrical impulse causes small vesicles at the end of a motor neuron to bind with the cell wall and release the neurotransmitter acetylcholine (ACh). E. Calcium binds with the troponin on the actin filament, exposing attachment points. F. ACh diffuses across the synaptic cleft, where it stimulates receptors in the sarcolemma. G. Calcium ions are pumped back into the sarcoplasmic reticulum. H. The myosin heads of the thick filaments grab onto the thin filaments and muscle contraction occurs.

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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IV. Sequence of Events: Muscle Contraction See if you can place the events that occur during muscle contraction and relaxation in their proper order. Insert numbers in the spaces provided to order the events in the proper sequence. A. An electrical impulse travels over the sarcolemma and inward along the T tubules, causing sacs in the sarcoplasmic reticulum to release calciun. B. The release of ACh stops and acetylcholinesterase breaks down any remaining ACh. C. Troponin and tropomyosin prevent the myosin heads from grasping the thin filament, and the muscle fiber relaxes. D. An electrical impulse causes small vesicles at the end of a motor neuron to bind with the cell wall and release the neurotransmitter acetylcholine (ACh). E. Calcium binds with the troponin on the actin filament, exposing attachment points. F. ACh diffuses across the synaptic cleft, where it stimulates receptors in the sarcolemma. G. Calcium ions are pumped back into the sarcoplasmic reticulum. H. The myosin heads of the thick filaments grab onto the thin filaments and muscle contraction occurs.
Transcribed Image Text:IV. Sequence of Events: Muscle Contraction See if you can place the events that occur during muscle contraction and relaxation in their proper order. Insert numbers in the spaces provided to order the events in the proper sequence. A. An electrical impulse travels over the sarcolemma and inward along the T tubules, causing sacs in the sarcoplasmic reticulum to release calciun. B. The release of ACh stops and acetylcholinesterase breaks down any remaining ACh. C. Troponin and tropomyosin prevent the myosin heads from grasping the thin filament, and the muscle fiber relaxes. D. An electrical impulse causes small vesicles at the end of a motor neuron to bind with the cell wall and release the neurotransmitter acetylcholine (ACh). E. Calcium binds with the troponin on the actin filament, exposing attachment points. F. ACh diffuses across the synaptic cleft, where it stimulates receptors in the sarcolemma. G. Calcium ions are pumped back into the sarcoplasmic reticulum. H. The myosin heads of the thick filaments grab onto the thin filaments and muscle contraction occurs.
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