idpters 6-8: Muscle and Neuromuscular Junction 1 Myofibrils 2 Titin 3 Actin fila
ID: 269397 • Letter: I
Question
idpters 6-8: Muscle and Neuromuscular Junction 1 Myofibrils 2 Titin 3 Actin filaments Excitatory transmitter that excites muscle fiber membrane B Required to cause smooth muscle relaxation Thousands grouped together to form the muscle fiber D C 4 Tropomyosin 6 Acetylcholine 8 Subneural clefts Nerve fiber sympase at muscle fiber 5 Sarcomere E Bloc k active sites on actin filaments to block myosin attraction F activates myosin cross-bridges in smooth muscle 7 Neuromuscular junction Muscle sections between Z discs that individually contract G H Composed of actin, tropomyosin and troponin 1Folds on the muscle membrane in a synaptic trough J Elastic springy proteins attached between Z disc and myosir K Muscle tension when myosin heads pull on actin filaments L Gap junctions at fusions of muscle cells 9 Calmodulin 10 Calcium pump 11 Walk-along theory 12 Intercalated discsExplanation / Answer
1) Myofibrils - C Thousands grouped together to form the muscle fiber
2) Titin - Elastic springy proteins attached between Z disc and myosin
3) Actin filaments - H Composed of actin, tropomyosin and troponin
4) Tropomyosin - E Block active sites on actin filaments to block myosin attraction
5) sarcomere - G Muscle sections between Z discs that individually contract
6) acetyl choline - A Excitatory transmitter that excites muscle fiber membrane
7) Neuromuscular junction - D Nerve fiber sympase at muscle fiber
8) SUB NEURAL CLEFTS- Folds on the muscle membrane in a synaptic trough
9) calmodulin - F activates myosin cross-bridges in smooth muscle
10) calcium pump - B Required to cause smooth muscle relaxation
11) walk along theory - K Muscle tension when myosin heads pull on actin filaments
12) intercalated discs - L Gap junctions at fusions of muscle cells
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