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Videos de Conceptos Relacionados

Communication01:03

Communication

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Communication between two animals occurs when one animal transmits an information signal that causes a change in the animal that receives the information. Organisms communicate with one another in a host of different ways. Signals can be auditory, chemical, visual, tactile, or a combination of these. Communication is a critical behavioral adaptation that promotes survival, growth, and reproduction.
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Communication01:28

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Sharing information, concepts, and emotions to foster mutual understanding is communication. The sender, recipient, and transaction must be considered in this manner. The sender is the person who shares the message, the recipient is the person who receives and understands the message, and the transaction is the method used to deliver the message and the variables that affect the communication's context and surroundings. The nurse-client connection is built on therapeutic communication.
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The Wave Nature of Light02:12

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The nature of light has been a subject of inquiry since antiquity. In the seventeenth century, Isaac Newton performed experiments with lenses and prisms and was able to demonstrate that white light consists of the individual colors of the rainbow combined together. Newton explained his optics findings in terms of a "corpuscular" view of light, in which light was composed of streams of extremely tiny particles traveling at high speeds according to Newton's laws of motion.
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Communication is a lifelong learning process. Through therapeutic communication, nurses can collect relevant assessment data, provide education and counseling, and interact during nursing interventions. Sending and receiving messages occur through verbal and nonverbal communication techniques and can happen separately or simultaneously.
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Neuronal Communication01:28

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Neurons, the fundamental units of the brain and nervous system, communicate through complex electrochemical signals that underpin all cognitive and bodily functions. This communication is primarily facilitated by a process involving the generation and propagation of an action potential along the axon of the neuron. When the internal electrical charge of a neuron surpasses a certain threshold, an action potential is triggered. This rapid change in voltage travels swiftly along the axon to the...
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A half-wave rectifier is a fundamental circuit in electronics, designed to convert alternating current (AC) voltage into a unidirectional voltage. It utilizes the simplest form of diode rectification, where the circuit comprises a single diode in series with a load resistor and an AC power source.
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Comunicación intercelular colectiva a través de ondas de activación hidrodinámicas ultrarrápidas

Arnold J T M Mathijssen1, Joshua Culver2, M Saad Bhamla3

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Área de la Ciencia:

  • La biofísica
  • Biología celular
  • Dinámica de fluidos

Sus antecedentes:

  • Las relaciones biofísicas sensor-actuador son cruciales para la vida.
  • Los organismos acuáticos dependen de respuestas rápidas a los estímulos para sobrevivir.
  • Los protistas como Spirostomum ambiguum exhiben comportamientos complejos.

Objetivo del estudio:

  • Descubrir y caracterizar nuevos mecanismos de señalización en las comunidades celulares.
  • Para investigar la rápida propagación de la información en Spirostomum ambiguum.
  • Para entender las bases biofísicas del comportamiento celular colectivo.

Principales métodos:

  • Observación de las contracciones y generación de flujo de Spirostomum ambiguum.
  • Desarrollo de un dispositivo de flujo de succión de alto rendimiento para la detección de la mecanicidad.
  • Modelado cuantitativo utilizando la teoría de la antena y la percolación.

Principales resultados:

  • Descubrimiento de "ondas gatillo hidrodinámicas" que se propagan mucho más rápido que la velocidad de natación celular.
  • Demostración de que las contracciones celulares generan flujos de vórtice de largo alcance que activan a los vecinos.
  • Identificación de una densidad crítica de la colonia para una comunicación colectiva sostenida mediante una transición de fase.

Conclusiones:

  • Las ondas gatillo hidrodinámicas permiten una comunicación ultrarrápida en Spirostomum ambiguum.
  • Este mecanismo de señalización puede organizar comunidades e influir en el comportamiento.
  • Otros organismos acuáticos pueden emplear mecanismos similares.