Which ion binds to troponin thereby stimulating a

Last updated: 3/9/2023

Which ion binds to troponin thereby stimulating a conformational change in the position of ponin tropomyosin complex allowing the myosin heads to interact with the thin filament B calcium Ca 2 C potassium K D ATP sodium Na E calmodulin 42 In skeletal muscle depolarization is due to the influx inward movement of which ion A Na B K C Ca D Mg E CI Cl 43 In skeletal muscle relaxation the detachment of the myosin cross bridges is directly triggered by A the repolarization of the T tubules B the attachment of ATP to myosin heads C sodium ions D calcium ions 44 What happens to contraction if a segment of smooth muscle is placed in a saline bath from which all calcium has been removed The muscle would continue to contract as it had been initially B The muscle contraction would speed u C The muscle contraction would gradually cease 45 An action potential initiated at the neuromuscular junction motor end plate rapidly spreads to the c portions of a muscle cell by means of the 7 lines D transverse tubules T tubul B sarcoplasmic reticulum C H zone