Not exact matches
In future studies, Datta and his team will examine whether MS4A proteins act
as a primordial
odor receptor across species.
Here, the smell is retained in the maze of scent
receptors even after the dog exhales; the
odor is not expelled
as it is with humans.
When a particular molecule happens to fall into a matching
receptor, a neural signal is triggered that is transmitted to the brain
as an
odor.
The animals had lost many olfactory
receptors, which detect
odors,
as well
as urinary proteins, which can impact social status and mate choice.
Each
odor - detecting neuron (referred to
as olfactory sensory neuron from here on), chooses a single odorant
receptor gene from a fairly large number of options that are split into class I (fish - like) and class II (terrestrial - specific) odorant
receptors.
Professor Bargmann then embarked upon what was to become a lifetime mission to define how genes and the environment influence behavior by dissecting the neural circuitry of C. elegans and the genes,
receptors, and signaling molecules involved in such behavior
as feeding and responses to
odors.
They have more than 100 million sensory
receptor sites in the nasal cavity
as compared to 6 million in people, and the area of the canine brain devoted to analyzing
odors is about 40 times larger than the comparable part of the human brain.
«Even though dogs have four to five times
as many scent
receptors as cats, cats are much more sensitive to
odors,» says Guardian.
You can think of dogs
as having two noses — the 300 million olfactory
receptors and their Jacobson's organ — and this Synaptic Smelling System (my phrase, trademark pending) allows trained dogs to detect
odors called volatile organic compounds.