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13 years ago
The interaction between Ca2+ and calmodulin in smooth muscle fibers has been described as a second messenger system. Develop an argument to support this position, using another second messenger system you have studied for comparison.
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Human Physiology: An Integrated Approach

Human Physiology: An Integrated Approach


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13 years ago
Ca2+ forms a complex with calmodulin. This complex activates myosin light chain kinase, which in turn activates myosin ATPase via phosphorylation, triggering the contraction cycle. The second messengers cGMP and cAMP also phosphorylate proteins to affect cell activity.
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