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相关概念视频

Olfaction01:25

Olfaction

40.5K
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...
40.5K
Olfactory Receptors: Location and Structure01:03

Olfactory Receptors: Location and Structure

10.5K
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...
10.5K
Physiology of Smell and Olfactory Pathway01:20

Physiology of Smell and Olfactory Pathway

13.1K
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...
13.1K

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In vivo Ca2+- Imaging of Mushroom Body Neurons During Olfactory Learning in the Honey Bee
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嗅觉:蜜蜂的气味触发导航.

Judith Reinhard1, Mandyam V Srinivasan, Shaowu Zhang

  • 1Visual Sciences, Research School of Biological Sciences, The Australian National University, GPO Box 475, Canberra, ACT 2601, Australia. reinhard@rsbs.anu.edu.au

Nature
|January 30, 2004
PubMed
概括

蜜蜂 (Apis mellifera) 可以通过学习的气味来导航到食物来源. 将熟悉的气味引入蜂巢可以触发到特定位置的导航,即使没有食物存在.

科学领域:

  • 动物行为 动物行为
  • 感官生态学 感官生态学
  • 神经伦理学 神经伦理学

背景情况:

  • 蜜蜂 (Apis mellifera) 是重要的授粉者,具有非凡的导航能力.
  • 导航依赖于整合视觉,嗅觉和味觉线索.
  • 了解嗅觉驱动的导航是解读蜜蜂寻策略的关键.

研究的目的:

  • 为了研究嗅觉线索是否能单独触发蜜蜂学习的导航路线.
  • 为了确定气味记忆是否可以在熟悉的位置上取代食物奖励的缺席.

主要方法:

  • 蜜蜂被训练在不同的户外地点将特定的气味与糖器联系起来.
  • 随后,在训练场所,在没有食物的情况下,将气味引入了蜂巢.
  • 对这些地点的蜜蜂访问模式进行了监测.

主要成果:

  • 蜜蜂被诱导访问受过训练的地点,仅仅是由于蜂巢内的相关气味的存在.
  • 即使在目的地没有食物奖励和气味时,这种效应仍然存在.
  • 熟悉的气味有效地触发了导航记忆,加速了路线回忆.

结论:

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  • 嗅觉线索在蜜蜂的导航和记忆中起着重要作用.
  • 基于气味的记忆可以成为启动食飞行的强大驱动力.
  • 这一发现对理解昆虫的导航和潜在的害虫控制或授粉管理有意义.