Question at position 55 Which property of muscle tissue enables it to respond to a stimulus, such as a hormone or motor neuron signal?ContractilityElasticityExcitabilityExtensibility

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Question at position 55 asks which property of muscle tissue enables it to respond to a stimulus, such as a hormone or motor neuron signal. 
Option 1: Contractility. While contractility refers to the ability of muscle fibers to shorten and generate force, this property is about the outcome of activation rather than the initial responsiveness to a stimulus. It is a consequence of excitability and the biochemical processes that follow activation.
Option 2: Elasticity. Elasticity describes the ability of tissue to return to its original shape after being stretched. This property is about deformation and recoil, not about sensing or responding to a stimulus from nerves or hormones.
Option 3: Excitability. Excitability is the capacity of muscle (and other excitable tissues) to respond to a stimulus—such as a neurotransmitter or hormone—by generating an electrical impulse or action potential that triggers downstream events leading to contraction. This property directly accounts for the tissue’s responsiveness to signals.
Option 4: Extensibility. Extensibility refers to the ability of a tissue to be stretched or extended beyond its resting length. While important for function, it describes a mechanical capability rather than the initial detection and response to an external signal.
In summary, among the listed properties, the one that most accurately describes the ability to respond to a stimulus like a hormone or motor neuron signal is the property that denotes a tissue’s responsiveness to such stimuli, i.e., excitability. The other properties describe mechanics or outcomes of activation rather than the initiating responsiveness.

Question at position 55 Which property of muscle tissue enables it to respond to a stimulus, such as a hormone or motor neuron signal?ContractilityElasticityExcitabilityExtensibility

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Question at position 55 Which property of muscle tissue enables it to respond to a stimulus, such as a hormone or motor neuron signal?ContractilityElasticityExcitabilityExtensibility

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Antagonists muscle group: A to B: EJ __extenders __ B to A: EJ __ extenders __ Antagonists are passively __ lengthening __ from A to B and passively __shortening __ from B to A.

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