2. A pinch on an animal’s right hind foot excites a sensory neuron that excites an interneuron that excites the motor neurons to the fl exor muscles of that leg. Th e interneuron also inhibits the motor neurons connected to the extensor muscles of the leg. In addition, this interneuron sends impulses that reach the motor neuron connected to the extensor muscles of the left hind leg.

Would you expect the interneuron to excite or inhibit that motor neuron? (Hint: Th e connections are adaptive.

When an animal lifts one leg, it must put additional weight on the other legs to maintain balance.)