high in each nostril
Receptor neurons in the nostrils first detect an odor by coming into contact with and reacting to gas molecules of the substance. Then the receptor neurons send information about the odor along the olfactory nerve to the brain.
Neurons
A Synapse is the space between two neurons or between a neuron and a receptor organ. A single neuron can have a few, or several hundred synapses.
The sense of smell uses sensory neurons.
The receptors that actually bind with the molecules that we smell are called Olfactory receptor neurons. They pass their signal through the caribform plate, then down the olfactory nerve, and finally to the olfactory bulb in the brain.
They are specialised neurons in direct communication with the olfactory lobe in the brain. They differ from other neurons in having exposed receptor sites in the nasal mucosa that bind to various odoriferous chemicals. When a specific chemical binds to its appropriate receptor site, the neuron foires, releasing the chemical which may well trigger a lot more neurons. This way the brain can distinguish what smells are important. The system is poorly developed in man, but the dog has 100,000 times more receptors than we have. That's why drug sniffing dogs can find your stash so easily... Partial answer: they are found in the nose, they serve to smell and identify smells, and they play a significant role in the taste of food.
When a receptor is stimulated it triggers impulses in other neurons....hope this was helpful and correct
the receptor cells in the olfactory membrane.....
third order neuron
nose
nose
An adrenergic receptor is any of several sites in the surface membranes of cells innervated by adrenergic neurons.