The given figure represents the cross-bridge cycle in skeletal muscle. What does step $B$ in the figure represent?
- AAttachment of myosin head to actin forming a cross-bridge.
- BRelease of phosphate. Myosin changes shape to pull actin.
- CAttachment of new $ATP$ to myosin head. The cross-bridge detaches.
- DSplitting of $ATP$ into $ADP$ and $\Pi$. Myosin cocks into its high-energy conformation.
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Similar Questions
Select the correct statements regarding the mechanism of muscle contraction.
$A.$ It is initiated by a signal sent by $\text{CNS}$ via a motor neuron,not a sensory neuron.
$B.$ Neurotransmitter generates an action potential in the sarcolemma.
$C.$ Increased $Ca^{++}$ level leads to the binding of calcium with troponin on actin filaments.
$D.$ Masking of the active site of actin prevents contraction; unmasking leads to contraction.
$E.$ Utilising the energy from $\text{ATP}$ hydrolysis to form a cross-bridge.
$A.$ It is initiated by a signal sent by $\text{CNS}$ via a motor neuron,not a sensory neuron.
$B.$ Neurotransmitter generates an action potential in the sarcolemma.
$C.$ Increased $Ca^{++}$ level leads to the binding of calcium with troponin on actin filaments.
$D.$ Masking of the active site of actin prevents contraction; unmasking leads to contraction.
$E.$ Utilising the energy from $\text{ATP}$ hydrolysis to form a cross-bridge.
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$P \quad\quad Q \quad \quad R$
$P \quad\quad Q \quad \quad R$
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View SolutionWhich of the following statements regarding the types of muscles present in our body is correct?
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View SolutionWhich one of the following pairs of chemical substances is correctly categorized?
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