Figure 15-1 Spinothalamic Tracts

Figure 15-1 Spinothalamic Tracts
Use Figure 15-1 to answer the following questions:
-Which of the following is true regarding the structure labeled "6"?
1) The synapse occurs between motor neurons.
2) The sensations may be filtered out.
3) The third-order neuron projects to the primary sensory cortex.
4) The third-order neuron's axon is identified.

A) 1 and 4
B) 2 only
C) 3 only
D) 3 and 4
E) 1 and 3