Smell

Definition

Smell is the ability to detect and identify airborne chemicals through the olfactory system. It plays a critical role in flavor perception and neurological health.

5 Must Know Facts For Your Next Test

1. The olfactory system is directly linked to the brain, influencing memory and emotional responses.
2. Dysfunction in smell can be an early indicator of neurodegenerative diseases such as Parkinson's and Alzheimer's.
3. Nutritional deficiencies, particularly of zinc and vitamin B12, can impair the sense of smell.
4. A healthy diet rich in antioxidants supports olfactory function by reducing oxidative stress on neural pathways.
5. Medications commonly used in neurology can have side effects that affect the sense of smell.

Review Questions

• How does the olfactory system influence neurological health?
• What are some nutritional deficiencies that can impair the sense of smell?
• Why might a decline in the sense of smell be significant in diagnosing neurodegenerative diseases?

Related terms

Olfactory System: A sensory system responsible for detecting odors and sending signals to the brain.

Neurodegenerative Diseases:

Disorders characterized by progressive degeneration of nerve cells, such as Alzheimer's and Parkinson's.

Oxidative Stress:

An imbalance between free radicals and antioxidants in the body, which can damage cells and tissues.