Question
True about olfactory system is/are?
A. Olfactory receptors act via c-AMP
B. Olfactory pathway passes via thalamus to orbitofrontal cortex
C. Adaptation to odour develops after 1-2minutes only
D. Olfactory mucosa covers upper 1/3rd of nasal cavity
E. Rate of olfactory nerve impulses change approximately in proportion to the logarithm of stimulus strength
Show Answer
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Correct Answer » A:B:D:E
Explanation
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Ans. A, B, D & E
In human, the olfactory mucous membrane (olfactory neuro epithelium) located in upper 1/3rd of nasal cavity including the roof of the nasal cavity).
The olfactory mucosa contains olfactory receptors.
The olfactory receptors are unique in that the receptor cell itself is a neuron.
The olfactory receptor cell has cilia projecting in the nasal mucosa which act as receptor for olfaction (These are dendrites of neuron/receptor cells).
The axons of olfactory neuron (olfactory receptor cells) form olfactory nerve which passes through cribriform plate and terminates in the olfactory bulb.
