EMBRYOLOGY
NERVOUS SYSTEM
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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olfactory epithelium
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mucus
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olfactory tract
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amygdala
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Detailed explanation-1: -The olfactory nerve is a solely sensory nerve and conveys the sense of smell. Its receptors are located in the olfactory mucosa under the roof of the nasal cavity.
Detailed explanation-2: -The olfactory epithelium includes several distinct cell types (Figure 15.5A). The most important of these is the olfactory receptor neuron, a bipolar cell that gives rise to a small-diameter, unmyelinated axon at its basal surface that transmits olfactory information centrally.
Detailed explanation-3: -The olfactory epithelium is composed of three distinct cell types: basal cells, olfactory sensory neurons, and sustentacular (or supporting) cells. The olfactory sensory neurons are bipolar neurons sensing environmental chemicals.
Detailed explanation-4: -This area (only a few centimeters wide) contains more than 100 million olfactory receptor cells. These specialized epithelial cells give rise to the olfactory vesicles containing kinocilia, which serve as sites of stimulus transduction.