Which of the following statements about skeletal muscle contraction is false? (only one correct answer) When a muscle cell recelves a signal from the nervous system, voltage-gated channels open in the T-tuk/Cle membrane. 1: During muscle contraction, the Z discs move closer together as the myosin heads walk toward the plus ends of the actin floments. The changes in voltage across the plasma membrane that occur when a muscle cell recelves a signal from the nervous system couse on influx of Ca^(2) into the sorcoplasmic reticulum, triggering a muscle contraction. A change in the conformotion of troponin leads to changes in tropornyosin such thot it no longer blocks the binding of myosin heads to the actin filoment.
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When a muscle cell receives a signal from the nervous system, voltage-gated channels open in the T-tubule membrane. 1. During muscle contraction, the Z discs move closer together as the myosin heads walk toward the plus ends of the actin filaments. 1. The changes Show more…
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Which of the following statements about skeletal muscle contraction is false? During muscle contraction, myosin heads walk toward the plus ends of the actin filaments. When a muscle cell receives a signal from the nervous system, voltage-gated channels open. A change in the conformation of troponin leads to changes in tropomyosin such that it no longer blocks the binding of myosin heads to the actin filament. The changes in voltage across the plasma membrane that occur when a muscle cell receives a signal from the nervous system cause an influx of Ca2+ into the sarcoplasmic reticulum.
Sri K.
Which of the following statements about skeletal muscle contraction is false? During muscle contraction, the Z discs move closer together as the myosin heads move toward the plus ends of the actin filaments. The changes in voltage across the plasma membrane that occur when a muscle cell receives a signal from the nervous system causes Ca2+ to flow into the sarcoplasmic reticulum, triggering a muscle contraction. An action potential in the muscle cell plasma membrane leads to voltage-gated calcium channels opening in the T-tubule membrane. Calcium activates troponin which in turn moves tropomyosin so that it no longer blocks the binding of myosin heads to the actin filament.
Adi S.
Which of the following statements about skeletal muscle contraction is false? A. The changes in voltage across the plasma membrane that occur when a muscle cell receives a signal from the nervous system cause Ca2+ to flow into the sarcoplasmic reticulum, triggering a muscle contraction. B. A change in the conformation of troponin leads to changes in tropomyosin such that it no longer blocks the binding of myosin heads to the actin filament. C. During muscle contraction, the Z discs move closer together as the myosin heads walk toward the plus ends of the actin filaments. D. An action potential in the muscle cell plasma membrane leads to voltage-gated calcium channels opening in the T-tubule membrane.
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