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Behavioral evidence suggests that these fluid-phase stimuli often function as pheromones, although pheromones can also be detected by the main olfactory system. In the accessory olfactory system, stimuli are detected by the vomeronasal organ, located in the vomer, between the nose and the mouth. Snakes use it to smell prey, sticking their ...
Each pheromone signal can elicit a distinct response based on the gender and social status of the recipient. [64] In insects, sex pheromones can be detected in very minute concentrations in the environment. Insect sex pheromones, usually released by the female to lure a male, are vital in the process by which insects locate each other for ...
Olfactory sensory neurons in the epithelium detect odor molecules dissolved in the mucus and transmit information about the odor to the brain in a process called sensory transduction. [ 4 ] [ 5 ] Olfactory neurons have cilia (tiny hairs) containing olfactory receptors that bind to odor molecules, causing an electrical response that spreads ...
For example, in many vertebrates, nerve signals from the brain pass sensory information to the hypothalamus about seasonal changes and the availability of a mate. In turn, the hypothalamus regulates the release of reproductive hormones required for breeding. [20] Some pheromones are detected by the main olfactory system. [21]
Pheromones have evolved in all animal phyla, to signal sex and dominance status, and are responsible for stereotypical social and sexual behaviour among members of the same species. In mammals, these chemical signals are believed to be detected primarily by the vomeronasal organ (VNO), a chemosensory organ located at the base of the nasal ...
A pheromone (from Ancient Greek φέρω (phérō) 'to bear' and hormone) is a secreted or excreted chemical factor that triggers a social response in members of the same species. Pheromones are chemicals capable of acting like hormones outside the body of the secreting individual, to affect the behavior of the receiving individuals. [1]
In vertebrates, the olfactory system detects odors and pheromones in the nasal cavity. Within the olfactory system there are two anatomically distinct organs: the main olfactory epithelium (MOE) and the vomeronasal organ (VNO). It was initially thought that the MOE is responsible for the detection of odorants, while the VNO detects pheromones.
Without perfume or aftershave, humans unconsciously detect people's natural scents: in the form of pheromones. Pheromones are usually detected unconsciously, and it is believed that they have an important influence on human's social and sexual behaviour. [61]