chapter 8: special senses - taste Flashcards
chemoreceptors
taste and smell use them, stimulated by chemicals in solution
where are olfactory receptors
roof of the nasal cavity
neurons with long cilia
olfactory hairs
what must chemicals do be detectable
dissolved in mucus
what makes up the olfactory nerve
olfactory filaments
where is interpretation of smells made in
olfactory cortex
what do taste buds house
receptor organs
what are the locations of the tastebuds
tongue, soft palate, inner cheeks
what is the dorsal tongue covered in
projections called papillae
filiform papillae
sharp with no tastebuds
fugiform papillae
rounded with tastebuds
circumvallate papillae
large papillae with taste buds
where are taste buds found on the papillae
the sides
what are the specific cells that respond to chemical dissolved in saliva
epithelial cells
what are the receptors of the epithelial cells
gustatory cells
what do epithelial cells have
gustatory hairs (long microvilli)
where is taste transported
impulses are carried to the gustatory complex by several canial nerves because tastebuds are found in different areas
what are the 3 nerves involved with taste
facial nerve, glossopharyngeal nerve, vagus nerve
what are the 4 taste sensations
sweet receptors, sour receptors, bitter receptors, salty receptors
what do sweet receptors do
sugars, saccharine, some amino acids, may respond to the OH-
what are sour receptors
acids, may respond to the H+
what are the bitter receptors
alkaloids
what are the salty receptors
metal ions in solution
what are the developmental aspects of the special senses
formed early in embryonic development, eyes are outgrowths of the brain, all special senses are functional at birth
