What are pheromones and how are they detected in mammals?

What are pheromones and how are they detected in mammals?

• A. Pheromones are visual signals detected through the retina.
• B. Pheromones are chemical signals that influence behavior and are detected via olfactory receptors and often the vomeronasal organ.
• C. Pheromones are auditory messages detected by the inner ear.
• D. Pheromones are tactile cues detected by skin receptors.

Answer: (B)

Pheromones are chemical signals that animals release to communicate with others of the same species, influencing social and reproductive behaviors. In mammals, these signals are detected by the smell system: olfactory receptors in the main nasal cavity pick up many odorants, and many mammals also rely on the vomeronasal organ (often called the Jacobson’s organ) to sense specific pheromones. When these chemicals bind to their receptors, they activate neural pathways that can trigger mating, aggression, territory, or maternal responses, often without conscious awareness. This is different from signals that are visual (detected by the retina), auditory (detected by the inner ear), or tactile (detected by skin receptors), which do not involve pheromone signaling.

Pheromones are chemical signals that animals release to communicate with others of the same species, influencing social and reproductive behaviors. In mammals, these signals are detected by the smell system: olfactory receptors in the main nasal cavity pick up many odorants, and many mammals also rely on the vomeronasal organ (often called the Jacobson’s organ) to sense specific pheromones. When these chemicals bind to their receptors, they activate neural pathways that can trigger mating, aggression, territory, or maternal responses, often without conscious awareness. This is different from signals that are visual (detected by the retina), auditory (detected by the inner ear), or tactile (detected by skin receptors), which do not involve pheromone signaling.