Anatomy of Smell

Where are the olfactory sensory neurons located?

• Roof of the nasal cavity

• Base of the frontal lobe

• In the ear

• In the mouth

What do olfactory neurons convert chemical stimuli into?

• Heat

• Sound waves

• Electrical signals

• Light

How many different receptors are there in humans for odorants?

• 800

• 400

• 200

• 100

What type of receptors are odorant receptors?

• Ligand-gated receptors

• Ion channels

• G protein-coupled

• Enzyme receptors

What is the condition known as when there is a permanent loss of sense of smell?

• Anosmia

• Hyperosmia

• Dysgeusia

• Parosmia

What is the primary olfactory cortex responsible for?

• Smell

• Taste

• Vision

• Hearing

What is the result of illnesses that cause inflammation of the nasal mucosa?

• Permanent anosmia

• Transient anosmia

• Hyperosmia

• Parosmia

What does the loss of smell affect?

• Hearing

• Taste experience

• Vision

• Balance

What is anosmia an early sign of?

• Heart disease

• Neurodegenerative disorders

• Lung disease

• Kidney disease