Answer:
effector
Explanation:If the value is not at the set point or is outside the normal range, the control center sends a signal to the effector. The effector is an organ, gland, muscle, or other structure that acts on the signal from the control center to move the variable back toward the set point.
The correct answer is option glucose.
The glucose can be used as the immediate source of the energy. The cells can utilize the glucose to form the ATP molecules, which can be used as a source of energy by the body of the organism. The cellulose, chitin, and the glycogen are the polymers, they can only be utilized, once they are broken down into simpler forms.
C) a system is a set of parts that function together as a whole
