Final answer:
Without access to Figure 7.11, a specific answer cannot be provided. However, the internal auditory canal (IAC) is located on the medial wall of the petrous ridge in the posterior cranial fossa and serves as a passage for auditory and facial nerves.
Step-by-step explanation:
To identify which arrow points to the internal auditory canal (IAC), one must understand its anatomical location. The IAC is also known as the internal acoustic meatus, and is located on the medial wall of the petrous ridge in the posterior cranial fossa. It provides a pathway for the facial and vestibulocochlear nerves, which are responsible for the sensory input for hearing and equilibrium, as well as motor supply to the muscles of the face.
However, based on the description provided in the reference materials, you should look for the arrow that points to an opening found on the medial wall of the petrous ridge near the foramen magnum—this will be the IAC. The hypoglossal canal, on the other hand, is located at the anterior-lateral margin of the foramen magnum and allows for passage of the nerve to the tongue. Therefore, ensure to differentiate between these two during identification. Keep in mind that this explanation is general and you need the specific figure to make the correct identification.