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Related Concept Videos

Olfaction01:25

Olfaction

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The sense of smell is achieved through the activities of the olfactory system. It starts when an airborne odorant enters the nasal cavity and reaches olfactory epithelium (OE). The OE is protected by a thin layer of mucus, which also serves the purpose of dissolving more complex compounds into simpler chemical odorants. The size of the OE and the density of sensory neurons varies among species; in humans, the OE is only about 9-10 cm2.
The olfactory receptors are embedded in the cilia of the...
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Olfactory Receptors: Location and Structure01:03

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The process of olfaction, also known as the sense of smell, is a sophisticated chemical response system. The specialized sensory neurons that facilitate this process, known as olfactory receptor neurons, are situated in an upper segment of the nasal cavity, known as the olfactory epithelium. Olfactory sensory neurons are bipolar, with their dendrites extending from the epithelium's apex into the mucus that lines the nasal cavity. Airborne molecules, when inhaled, traverse the olfactory...
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Humans detect odors with the help of specialized cells located in the upper part of the nasal cavity, called olfactory receptor neurons (ORNs). ORNs possess hair-like structures called cilia, which are receptive to sensations from the inhaled air. When an odorant molecule binds to a specific receptor on the cell of the cilia, it leads to a series of events that ultimately cause the ORN to send electrical signals to the olfactory bulb in the brain through the olfactory nerves.
The olfactory...
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Introduction to Special Senses01:26

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Sensory receptors play an integral part in comprehending our external and internal environments. They receive diverse stimuli, converting them into the nervous system's electrochemical signals. This conversion occurs as the stimulus alters the sensory neuron's cell membrane potential, instigating the generation of an action potential. This action potential is subsequently transmitted to the central nervous system (CNS), which integrates with other sensory data or higher cognitive...
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Tactile and Chemical Senses01:27

Tactile and Chemical Senses

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Tactile senses encompass touch, temperature, and pain, each mediated by specific receptors. Touch receptors detect mechanical energy or pressure against the skin. Sensory fibers from these receptors enter the spinal cord and relay information to the brain stem. Here, most fibers cross over to the opposite side of the brain. The touch information then moves to the thalamus, which projects a map of the body's surface onto the somatosensory areas of the parietal lobes in the cerebral cortex.
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Related Experiment Video

Updated: Jan 7, 2026

Using Insect Electroantennogram Sensors on Autonomous Robots for Olfactory Searches
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Olfactory Sensing and Navigation in Turbulent Environments.

Gautam Reddy1, Venkatesh N Murthy2,3, Massimo Vergassola4,5

  • 1NSF-Simons Center for Mathematical & Statistical Analysis of Biology, Harvard University, Cambridge, Massachusetts, USA.

Annual Review of Condensed Matter Physics
|January 5, 2026
PubMed
Summary
This summary is machine-generated.

Animal navigation using scent relies on fluid turbulence, which aids odor dispersal for finding food and mates. However, navigating turbulent environments presents significant challenges for animals like birds and insects.

Keywords:
biological navigationfluid turbulenceneurobiologyodor transportolfaction

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Area of Science:

  • Animal behavior
  • Fluid dynamics
  • Sensory biology

Background:

  • Fluid turbulence presents both opportunities and challenges for macroscopic animal navigation.
  • Turbulence facilitates long-distance odor detection for foraging and reproduction, overcoming limitations of molecular diffusion.
  • Navigating unpredictable turbulent flows requires complex learning and adaptive strategies.

Purpose of the Study:

  • To review the dual role of fluid turbulence in animal navigation.
  • To summarize olfactory mechanisms and computational challenges in olfactory-guided navigation.
  • To discuss current navigational strategies and future research directions in turbulent environments.

Main Methods:

  • Review of existing literature on animal olfaction, turbulent transport dynamics, and navigation strategies.
  • Analysis of how turbulent flow characteristics impact animal behavior.
  • Synthesis of information on olfactory organs, sensory processing, and computational tasks.

Main Results:

  • Turbulence enhances the effectiveness of olfactory cues for locating resources and mates over distances.
  • The unpredictable nature of turbulence poses significant challenges for developing robust navigation strategies.
  • Animals utilize specialized olfactory organs and sophisticated computational processes to interpret scent signals in turbulent conditions.

Conclusions:

  • Fluid turbulence is a critical factor in olfactory-guided navigation for many animal species.
  • Understanding animal strategies for navigating turbulence is essential for fields ranging from ecology to robotics.
  • Future research should focus on the interplay between sensory processing, learning, and behavioral adaptation in turbulent environments.