_____ are biochemical odorants emitted by other members of its species that can affect an animal's behaviour or physiology.

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Pheromones are chemical signals emitted by animals that can affect the behavior or physiology of other members of the same species. They are used for various purposes, such as attracting mates, marking territories, and signaling danger. Hormones are also chemical signals, but they are produced internally and circulate within the bloodstream to affect various body functions. ORNs (olfactory receptor neurons) are specialized cells in the nose that detect odors, and sweat glands produce sweat, which may contain odorants but not necessarily pheromones.

_____ Are Biochemical Odorants Emitted by Other Members of Its