Question

The receptor cells serving taste 

A. Are confined to the tongue. 

B. Are stimulated when chemicals diffuse through the overlying epithelium to reach them. 

C. Are primary sensory neurones. 

D. Are histologically different for the four primary taste modalities. 

E. For sweetness are more common at the tip than at the back of the tongue.

Answer 1

A. False They are found also in the soft palate, pharynx and larynx. 

B. False The microvilli on top of receptors protrude through taste pores into the buccal cavity. 

C. False They are receptor cells which synapse with primary sensory neurones. 

D. False They look alike. 

E. True Sweet sensation is experienced at the front of the tongue; bitterness at the back.