In the first step of a somatic reflex arc, a stimulus activates a receptor in the skin, muscles, or tendons. This is further explained below.
Generally, A molecule that may be found either on the surface of a cell or within the cell binds to a particular chemical and elicits a particular response from the cell.
In conclusion, A stimulus will first activate a receptor in the skin, muscles, or tendons of an area of the body in order to begin the process of somatic response.
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