Copyright ©Mark Nelson, 2002. All rights reserved.
Chapter 13: Chemical Senses
What you need to know
(exam questions will be a drawn from this subset of material)
What are three broad categories of chemical senses? Why are they considered
separate senses? (p. 309-310)
Where do vertebrate gustatory receptors project in the CNS? (p. 310-311)
Where do vertebrate olfactory receptors project in the CNS? (p. 311-312)
What is unique abou the pathway from olfactory recepetors to the telencephalon?
Whats similar about the microenvironment around gustatory and olfactory
What is the "typical" way that chemoreceptors transduce chemical stimuli?
What special mechanisms are involved in transduction of sour (acidic) tastes?
(p. 317, Fig. 13-5A)
What special mechanisms are involved in transduction of salty tastes? (p. 317, Fig. 13-5B)
What type of sensory coding is used in the gustatory system? (p. 321-322)
What type of sensory coding is used in the olfactory system? (p. 322-324)
How many kinds of vertebrate olfactory receptor proteins are there? How
many kinds does a single receptor express (p. 322-324)
How do signals get from the vertebrate olfactory receptors to the brain?
(p. 324-325; Fig. 13-10)
What are olfactory glomeruli? (p. 325-326)
Where are you likely to find insect chemoreceptors? (p. 326-327)
What's similar about olfactory receptors of insects and vertebrates? (p.326-328)
What's similar about the initial stages of olfactory processing in the CNS
of insects and vertebrates? (p.329-332)