The sense of smell, or olfaction, [nb 1] is the special sense through which smells (or odors) are perceived. [2] The sense of smell has many functions, including detecting desirable foods, hazards, and pheromones, and plays a role in taste.

2023年5月1日 · Olfaction is the chemical sensation of gaseous odorants colloquially referred to as the ability to smell. The olfactory nerve (cranial nerve one) in coordination with other neuroanatomical structures in the nasal passages, neurotransmitters, and the cerebral cortex is responsible for carrying out this intricate chemosensory process.

2022年9月19日 · Olfaction is the oldest sensory modality known in evolution. Odor detection is accomplished by an array of different ORs expressed by olfactory sensory neurons in the nasal olfactory epithelium. Olfaction signal transduction is crucial for sensing our environment.

Olfaction refers to the sense of smell, a unique sensory modality that plays a crucial role in mating, survival, and shaping the quality of life in humans. It involves the detection of chemical signals in our environment through a complex neuroanatomical structure and signaling cascades.

2025年3月17日 · Smell depends on sensory receptors that respond to airborne chemicals. In humans, these chemoreceptors are located in the olfactory epithelium — a patch of tissue about the size of a postage stamp located high in the nasal cavity.

Explain the process by which odorants activate olfactory receptors. Trace the path of olfaction from the olfactory receptors, to the initiation of an action potential in the olfactory nerves, through the olfactory bulb, the olfactory tract, and to the various parts of the brain.

Olfaction is one of the five basic human senses, and it is known to be one of the most primitive senses. The sense of olfaction may have been critical for human survival in prehistoric society, and although many believe its importance has diminished ...