* not completed

. The olfactory epithelium lies at the entrance to the nasal cavity.

True correct incorrect

False correct incorrect

* not completed

. The olfactory receptor cells synapse with the afferent fibres of the olfactory nerve

True correct incorrect

False correct incorrect

* not completed

. Which of the following statements regarding the olfactory system are true?

The olfactory nerve axons are unmyelinated and aggregate in bundles to form the first cranial nerve (CN I). correct incorrect

Odours only reach the olfactory sensory cells via the inhaled air correct incorrect

Water soluble odorants are bound by specific odorant binding proteins. correct incorrect

Individual sensory neurons respond to more than one odorant. correct incorrect

* not completed

. Olfactory receptors are coupled with a G protein that activates adenylyl cyclase.

True correct incorrect

False correct incorrect

* not completed

. At present, four distinct modalities of taste are recognized.

True correct incorrect

False correct incorrect

* not completed

. Which of the following statements about the sense of taste are correct?

The upper surface (dorsum) of the tongue is insensitive to specific taste sensations. correct incorrect

The taste cells of the tongue are innervated by afferent fibres of the vagus nerve (CNX). correct incorrect

Bitter tasting substances activate G protein coupled receptors that increase IP3. correct incorrect

Individual taste cells respond to several taste modalities correct incorrect