Regarding structures coming out of the spinal chord, which combo is incorrect:
a. nerve - both sensory and motor fibers
b. root - both sensory and motor fibers
c. ramus - both sensory and motor fibers

Feedback mechanisms regulate the rate of enzyme activity, effectively "turning off' an enzyme in a reversible way until more product is needed. which of the following would be most effective as a feedback mechanism? a. reduced concentration of product b. increased concentration of substrate c. a change in ph d. temporary binding of a non-substrate molecule in the active site