Certified Neuroscience Registered Nurse (CNRN) Exam 2025 – 400 Free Practice Questions to Pass the Exam

Anosmia refers specifically to the inability to perceive odor, which makes option B the correct choice. This condition can result from various factors, including nasal obstruction, neurological disorders, or damage to the olfactory system. The olfactory system is responsible for the sense of smell, and anosmia can significantly affect a person's quality of life, as it may also impact taste perception due to the close connection between smell and taste.

Loss of hearing pertains to auditory impairments, which is a different sensory system entirely and is not related to the inability to smell. Loss of taste refers to a diminished ability to detect flavors, which can occur independently from the sense of smell but is not what anosmia specifically addresses. Difficulty swallowing deals with the act of eating and is related to the gastrointestinal or neurological function, again being separate from olfactory function. Understanding these distinctions is important for recognizing how sensory systems operate and interact.