Senses For each of the special senses understand how a stimu

Senses

For each of the special senses, understand how a stimulus is received and then transmitted to the brain

Solution

Special senses are the senses that have specialised organs devoted to them like vision (eye), hearing and balance (ear) , smell( nose) , taste( tongue). Information from special senses is carried in special somatic afferents and special visceral afferents.

Taste sensation:  Chemoreceptors located in the taste buds of the tongue;

a. they detect chemicals present in food and in saliva

b.      Sweet, sour, bitter and salty are four basic tastes

c.      Pathways; Facial and Glossopharyngeal nerves in temporal and parietal lobes

4.        Smell sensation: Chemoreceptors in the upper nasal cavities detect volatile (vaporized) chemicals

a.      Pathways: Olfactory nerves to olfactory bulbs connected to olfactory areas in the temporal lobe

b.     Smell and taste sensations are synergistic