Final answer:
Feedforward regulation is a physiological mechanism that utilizes external and internal sensors to speed up a physiological reaction before changes are seen in the set point variable.
Step-by-step explanation:
The physiological mechanism that utilizes external and internal sensors to speed up a physiological reaction before changes are seen in the set point variable is called feedforward regulation. This mechanism allows the body to anticipate and prepare for future needs based on past experiences and learned responses from the central nervous system (CNS).