Figure 15-1 Spinothalamic Tracts

Use Figure 15-1 to answer the following questions:
-Identify the axon labeled "3."
A) axon of a lower motor neuron
B) axon of a upper motor neuron
C) axon of a first-order neuron
D) axon of a second-order neuron
E) axon of a ganglionic neuron

Question

Figure 15-1 Spinothalamic Tracts

Use Figure 15-1 to answer the following questions:
-Identify the axon labeled "3."
A) axon of a lower motor neuron 
B) axon of a upper motor neuron 
C) axon of a first-order neuron 
D) axon of a second-order neuron 
E) axon of a ganglionic neuron

Quizplus · Accepted Answer

The axon labeled "3" is part of the spinothalamic tracts, which ascend to the thalamus and are composed of second-order neurons. Therefore, the correct choice is D, axon of a second-order neuron.