Question

(spinal cord)
figure 14.1
using figure 14.1, choose the letter that match the following:

1. myelin sheath. 54) ______

figure 12.3
using figure 12.3, choose the letter that match the following:

1. site of autonomic motor neuron cell bodies. 55) ______

Explanation:

To solve this, we analyze the spinal cord structure. For 54) Myelin sheath: In the spinal cord, the myelin - producing cells (oligodendrocytes) form myelin around axons. The white matter (where myelinated axons are) is associated with the myelin sheath. Looking at the figure (spinal cord cross - section), the letter corresponding to myelin sheath (related to white matter/axonal myelination) needs to be identified. For 55) Site of autonomic motor neuron cell bodies: Autonomic motor neuron cell bodies are in the lateral horns of the spinal cord's gray matter. We match the letters to these structures.

Answer:

1. [Assume the correct letter from the figure, e.g., if it's E (depending on standard spinal cord diagrams, but need the exact figure). Let's say for example, if the myelin sheath is labeled E, then 54) E; and for 55), if the lateral horn (site of autonomic motor neuron cell bodies) is labeled, say, B, then 55) B. But since the figure details are partial, the process is as above. ]