48.關於骨骼肌纖維的橫橋週期（cross-bridge cycle）敘述，下列..-阿摩線上測驗

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48.關於骨骼肌纖維的橫橋週期（cross-bridge cycle）敘述，下列何者最正確？
(A)當肌纖維舒張時，橫橋仍與細肌絲（thin filament）緊密接合
(B)當橫橋產生強力滑動（power stroke）時，肌凝蛋白（myosin）釋放出ADP
(C)當細胞質中鈣離子濃度增加，可促使橫橋與肌動蛋白（actin）分離
(D)當橫橋內ATP水解，會促使肌凝蛋白（myosin）與肌動蛋白（actin）結合

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	4F 廣志繳完32年房貸高三下 (2024/06/24) (A) 當肌纖維舒張時，橫橋仍與細肌絲（thin filament）緊密接合休息狀態下，橫橋不與肌動蛋白（細肌絲）接觸。 (B) 當橫橋產生強力滑動（power stroke）時，肌凝蛋白（myosin）釋放出ADP (C) 當細胞質中鈣離子濃度增加，可促使橫橋與肌動蛋白（actin）分離鈣離子與旋轉肌素結合，露出肌動蛋白結合區，促使橫橋與肌動蛋白結合。 (D) 當橫橋內ATP水解，會促使肌凝蛋白（myosin）與肌動蛋白（actin）結合 ATP被分解釋出能量，促使肌凝蛋白與肌動蛋白分開。檢舉
	5F 面試倒楣鬼-22幸運上後西大二上 (2024/07/12) 1.緊密結合(45度) 2.ATP結合myosin,使之分離 3.水解ATP->ADP+Pi,但仍在myosin上 (角度變化 ) 4.重新結合(90度) 5.脫去Pi並引起收縮(45度) 6.脫去ADP, ->1重複 (56->1)似乎在其他人的回答圖算在同個步驟檢舉
	6F 宗翰大三下 (2024/07/13) 出自: Human Anatomy and Physiology THIRD EDITION p.256、258 (A) 當肌纖維舒張時，橫橋仍與細肌絲（thin filament）緊密接合: 尚未接合 4."Cocking" of the myosin head. .....The myosin head is in its high-energy configuration, ready to take another "step" and attach to an actin site farther along the thin filament. (B) 當橫橋產生強力滑動（power stroke）時，肌凝蛋白（myosin）釋放出ADP 2.Power stroke. .......At the same time, ADP and inorganic phosphate (Pi) generated during the prior contraction cycle are released from the myosin head. (C) 當細胞質中鈣離子濃度增加，可促使橫橋與肌動蛋白（a... 查看完整內容出自: Human Anatomy and Physiology THIRD EDITION p.256、258 (A) 當肌纖維舒張時，橫橋仍與細肌絲（thin filament）緊密接合: 尚未接合 4."Cocking" of the myosin head. .....The myosin head is in its high-energy configuration, ready to take another "step" and attach to an actin site farther along the thin filament. (B) 當橫橋產生強力滑動（power stroke）時，肌凝蛋白（myosin）釋放出ADP 2.Power stroke. .......At the same time, ADP and inorganic phosphate (Pi) generated during the prior contraction cycle are released from the myosin head. (C) 當細胞質中鈣離子濃度增加，可促使橫橋與肌動蛋白（actin）分離: 低 (a) At low intracellular Ca2+ concentration, tropomyosin blocks the binding sites on actin preventing myosin cross bridge attachment, which enforces the relaxed muscle state. p.257 (D) 當橫橋內ATP水解，會促使肌凝蛋白（myosin）與肌動蛋白（actin）結合: 下次接合 4."Cocking" of the myosin head. Hydrolysis of ATP to ADP and Pi by ATPase provides the energy needed to return the myosin head to its high-energy, or "cocked," position, which provides the potential energy needed for its next attachment-power stroke sequence. .....The myosin head is in its high-energy configuration, ready to take another "step" and attach to an actin site farther along the thin filament. 檢舉

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48.關於骨骼肌纖維的橫橋週期（cross-bridge cycle）敘述，下列..-阿摩線上測驗

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