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相关概念视频

Persuasion Strategies01:52

Persuasion Strategies

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Researchers have tested many persuasion strategies, including the foot-in-the door and the door-in-the-face techniques, in a variety of contexts. Ultimately, the principles are effective in selling products and changing people’s attitude, ideas, and behaviors (Cialdini & Goldstein, 2004).
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Language is a unique communication system that uses words and systematic rules to organize and transmit information. Unlike other forms of communication, which may involve postures, movements, odors, or vocalizations, language relies on symbols and grammar. This makes human communication distinct from that of other species, who also communicate but do not use language in the same way humans do.
Corballis and Suddendorf (2007) and Tomasello and Rakoczy (2003) highlight the role of language in...
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Overview
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Language and Cognition01:27

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Language serves as a bridge between ideas and communication, influencing how individuals perceive and interact with the world. Psychologists have long debated whether language shapes thought or vice versa. This discussion gained grip with Edward Sapir and Benjamin Lee Whorf in the 1940s, who proposed that language determines thought, a concept known as linguistic determinism. They suggested that the vocabulary and structure of a language influence how its speakers think and perceive reality.
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Language Development01:22

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Children master language quickly and with relative ease, supported by both biological predisposition and reinforcement. B. F. Skinner (1957) proposed that language is learned through reinforcement, while Noam Chomsky (1965) argued that language acquisition mechanisms are biologically determined.
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Natural selection influences the frequencies of particular alleles and phenotypes within populations in several different ways. Primarily, natural selection can be directional, stabilizing, or disruptive. Directional selection favors one extreme trait and shifts the population towards that phenotype while selecting against individuals displaying alternate traits. Stabilizing selection favors an intermediate trait with a narrow range of variation. Deviation from the optimal phenotype towards an...
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相关实验视频

Updated: Sep 28, 2025

Lexical Decision Task for Studying Written Word Recognition in Adults with and without Dementia or Mild Cognitive Impairment
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细胞明智地选择语言

Amy H Buck1

  • 1Institute of Immunology & Infection Research, School of Biological Sciences, University of Edinburgh, Edinburgh EH9 3FL, UK.

Cell
|April 1, 2022
PubMed
概括

细胞通信依赖于通过细胞外囊泡的RNA转移. 特定的微RNA序列决定了细胞之间包装和发送的微RNA数量,影响细胞间RNA信号传输.

科学领域:

  • 分子生物学
  • 细胞生物学
  • 生物化学

背景情况:

  • 细胞使用细胞外囊泡 (EVs) 传输分子,包括RNA.
  • 微RNAs (miRNAs) 是基因表达的关键调节者,并在细胞间的通信中发挥作用.
  • 控制特定miRNA在电动汽车中的选择性包装和释放的机制尚未完全理解.

研究的目的:

  • 研究微RNA在细胞外囊中的特定序列的作用.
  • 确定这些序列如何影响微RNA的细胞间转移.
  • 阐明选择性miRNA分类为EV的分子机制.

主要方法:

  • 使用分子生物学技术分析miRNA序列.
  • 采用细胞培养系统和细胞外囊分离方法.
  • 通过分子测定,在细胞内和孤立的EV中量化miRNA水平.

主要成果:

  • 证明微RNA分子内的不同序列直接影响其在细胞外囊中的丰度.
  • 表明这些依赖序列的效应调节了细胞之间转移的特定微RNA的数量.
  • 提供了基于序列的分类机制的证据,该机制控制了miRNA被装入EV.

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结论:

  • 微RNA中的特定序列是它们被包装成细胞外囊泡的关键决定因素.
  • 这种基于序列的机制为细胞间RNA通信提供了一种新的调节层.
  • 了解这些机制对于解读细胞如何解释细胞外RNA信号至关重要.