MSE Revision - Disorders of Senses 1

The ratio of olfactory to respiratory epithelium in the nasal cleft _______ with time?

• Increases
• Decreases
• Stays the same

Cells types that make up the olfactory epithelium include ciliated olfactory cells, microvillary cells, basal cells and:

• odorant cells
• Bowman's cells
• sustentacular cells
• memory cells

The _______ respond to the olfactory chemical stimuli.

• sustentacular cells
• basal cells
• olfactory cilia
• Bowman's glands

Olfactory neurons are:

• Bipolar
• Unipolar
• Pseudounipolar
• Multipolar

Axons from the olfactory neurons pass through the cribriform plate and synapse with the _______.

• olfactory tubercle
• perpiriform nucleus
• amygdaloid nucl
• olfactory bulb

Which of these nerves doesn't play a role on olfaction?

• Trigeminal
• Vagus
• Glossopharyngeal
• Optic

Within the olfactory cilia, odorants bind to G-protein coupled receptors, which activate adenylyl cyclase, which converts ATP to cAMP and activates a bunch of second messenger systems which cause the cell to:

• Depolarise
• Hyperpolarise

Dysosmia is:

• distorted or perverted smell
• an odor sensation in the absence of stimulation
• an inability to recognise smells
• a decreased ability to smell

Agnosia is:

• distorted or perverted smell
• an odor sensation in the absence of stimulation
• an inability to recognise smells
• a decreased ability to smell

Hyposmia is:

• distorted or perverted smell
• an odor sensation in the absence of stimulation
• an inability to recognise smells
• a decreased ability to smell