In other words: if you want to be the next Yves Saint Laurent, it helps to be completely and utterly obsessed with fashion. However, there are many aspects of the profession. Working as a fashion designer can just as well mean supervising a design team at a sportswear company as producing a label under your own name.
Olfactory receptor cells, actually neurons, are the site of transduction. Olfactory receptor cells are the only neurons in the nervous system that are regularly replaced (they last about 4-8 weeks). The size of the epithelium is a good indicator of the acuity of an animal's sense of smell.
TASTE & SMELL. Smell is the most primitive of the senses. Its role in finding food and warning of danger is vital for survival. The receptors of the chemical sensory systems send electrical signals to the brain when they bind to airborne (for smell) and dissolved (taste) molecules. The organization of the olfactory system is somewhat primitive too: receptors are dendrites of neurons that go directly to the brain.