PSY 252 Chapter Notes - Chapter 7: Spinothalamic Tract, Hydrophobe, Olfactory Nerve
Document Summary
Psy 252 chapter 7: taste, smell, touch, and pain. 6 primary taste qualities: sweet, salty, sour and bitter (later added: umami and fat) Each taste quality is associated with different molecules (tastants) Taste buds: groups of cells that respond to taste stimuli; found in 3 types of little bumps on the tongue called papillae. Fungiform papillae: sides and tip of tongue. Foliate papillae: folds along the sides of the rear of the tongue. Filiform papillae: contain no taste buds; help to abrade food. Slender projections (microvilli) from the top of each cell lie near an opening onto the surface of the tongue called a taste pore. Three large nerves (the chorda tympani, vagus, and glossopharyngeal) carry fibres from taste buds from the tongue to the solitary tract (located in the medulla) Common chemical sense: sensitive to a wide variety of different stimuli. This system consists mostly of the trigeminal nerve.
