A student is creating a diagram to illustrate the anatomical pathway of the body's primary hormonal stress response. The diagram depicts the following sequence: 1) A signal originates from a structure in the brain. 2) This signal acts on a second, nearby structure, also in the brain. 3) The second structure releases a hormone that travels to glands located in the pelvic cavity, sitting next to the reproductive organs. Which component of this diagram is anatomically misplaced?