Humoral regulation is the regulation of substances dissolved in fluids. Hormones are substances secreted by specialized cells throughout the body through the blood and interact with target cells. The fundamental differences between nervous and humoral regulation become clear. First, there is no direction of the nerve signal during humoral regulation. Regulation of the contractile activity of skeletal muscles is possible, of course, only with the help of the nervous system – otherwise, fine movements of the fingers, tongue, lips, vocal cords are provided. But when you need to increase, for example, the delivery of glucose to all cells in the body, hormones are remarkably effective at this task. Secondly, the nerve signal is fast, and the humoral signal is slow. Some changes in the environment require an immediate response, while others do not. And, thirdly, humoral signals are long, and nerve signals are short.
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