Chemoreception: Quick Facts

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Photos and Videos

A pine grosbeak with pink and gray plumage perches on a branch, eating red berries among autumn foliage.

Circumvallate papillae

Diagram showing the chemical transmission of nerve impulses at a synapse, with labeled steps illustrating neurotransmitter release from the presynaptic terminal, movement across the synaptic cleft, binding to postsynaptic channel receptors, and resulting signal propagation in the nervous system.

Two anatomical illustrations of the human tongue: the left shows a close-up of the tongue's surface with a magnified view of papillae, while the right displays a labeled cross section of the tongue in the mouth, highlighting its position relative to the teeth, lips, roof of mouth, lower jawbone, and air passage.

Cross-section diagram of the olfactory epithelium in the nasal cavity, showing labeled structures including olfactory receptor cells, supporting cells, basal cells, Bowman's gland, olfactory nerve fibers, cilia, and odor molecules.

Illustration showing the side view of a cat's head with its brain highlighted, alongside a labeled diagram of the cat brain identifying the olfactory bulb, cerebrum, and cerebellum.

Illustration showing the brain structure of a caiman, with a side view of the reptile's head highlighting the brain's location and a labeled diagram identifying the olfactory bulb, cerebrum, optic lobe, cerebellum, and pituitary.

Olfaction (sense of smell)

Black-and-yellow mangrove snake (Boiga dendrophila)

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Topics

feeding stimulant repellent antifeedant attractant common chemical sense olfactory system pheromone smell taste funnel canal Photoreception Mechanoreception Thermoreception human eye pain vision hearing

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Male muscle, man flexing arm, bicep curl.

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