Which of the following sensory cells is considered specialized epithelium (select all that apply)?
a) Olfactory cells
b) Gustatory cells
c) Hair cells of the cochlea
All of them i.e; a, b, c are specialized epithelial cells. The explanation for each of them is as follows.
Olfactory cells :
Olfactory receptor cells is a bipolar neuron. Dendrite of this neuron is short and it has an expanded end called olfactory rod. From this rod specialized cilia arise and project to the surface of olfactory mucus membrane. These cilia trap the odour molecule as they pass through the olfactory mucus membrane.
Gustatory cell :
Is a specialized epithelial cell that activates sensory fibres of facial, glossopharyngeal nerves by responding to chemical stimuli dissolved in saliva.
Hair cells of cochlea :
Hair cells are the columnar cells occupying the superficial part of the epithelium of organ of corti. There bases are supported by outer phalangeal cells. They are specialized cells that produce vibrations in response to sound waves.
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