The latch property of smooth muscle refers to the ability of the smooth muscle to maintain: Group of answer choices entirely relaxed state independent of free Ca++ levels force production while decreasing the rate of energy utilization the rate of ATP production after stimulation force in the absence of myosin light-chain phosphorylation a decreased membrane potential
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Step 1: The latch property of smooth muscle refers to the ability of the smooth muscle to maintain force production while decreasing the rate of energy utilization. Show more…
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Smooth muscle, in contrast with skeletal muscle, is not regulated by a tropomyosin-troponin mechanism. Instead, vertebrate smooth-muscle contraction is controlled by the degree of phosphorylation of its light chains. Phosphorylation induces contraction, and dephosphorylation leads to relaxation. Like that of skeletal muscle, smooth-muscle contraction is triggered by an increase in the cytoplasmic calcium ion level. Propose a mechanism for this action of calcium ion on the basis of your knowledge of other signal-transduction processes.
Adi S.
52. In muscle contraction, calcium apparently acts to: (A) Increase the action potential transmitted along the sarcolemma (B) Release the inhibition on T-tubules (C) Remove the blocking action of troponin/tropomyosin complex on actin (D) Cause ATP to bind to actin
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