Question

a) identify the structures the arrow points to.
b) which bone do they pass through?
c) what type of sensation are these nerve fibers responsible for carrying?
this is a cross section of the nasal cavity with an arrow pointing to yellow lines in the upper part of the cavity.

Explanation:

Part A:

The arrow points to the olfactory nerve fibers (or olfactory filaments). These are the nerve fibers associated with the sense of smell, originating from the olfactory receptors in the olfactory epithelium of the nasal cavity and projecting to the olfactory bulb.

Part B:

These olfactory nerve fibers pass through the cribriform plate of the ethmoid bone. The cribriform plate is a sieve - like structure of the ethmoid bone that allows the olfactory nerve fibers to travel from the nasal cavity to the cranial cavity (where the olfactory bulb is located).

Part C:

These nerve fibers are responsible for carrying olfactory (smell) sensations. The olfactory nerve (cranial nerve I) is dedicated to transmitting the sensory information related to the sense of smell from the olfactory receptors in the nose to the brain.

Answer:

A) Olfactory nerve fibers (or olfactory filaments)

B) Cribriform plate of the ethmoid bone

C) Olfactory (smell) sensations