Video Experimental Relacionado
Updated: Jul 27, 2026

11:53
Intracellular Recording, Sensory Field Mapping, and Culturing Identified Neurons in the Leech, Hirudo medicinalis
Published on: November 4, 2013
Actividad eléctrica después del reconocimiento celular del yo y el no-yo en una anémona de mar
Nature
|January 1, 1981
Resumen
Las anémonas marinas distinguen el yo del no-yo utilizando un sistema de reconocimiento celular específico. Esto desencadena la actividad eléctrica en sus estructuras picantes, lo que lleva a ataques contra individuos extranjeros.
Área de la Ciencia:
- Biología marina Biología marina.
- Inmunología Inmunología.
- Biología celular Biología celular.
Sus antecedentes:
- Las anémonas de mar (Anthopleura elegantissima) viven en colonias clonales.
- Poseen un sistema de reconocimiento celular altamente específico para identificar a los miembros de su propio clon.
- Los individuos no singenéticos, incluso de la misma especie, son atacados.
Objetivo del estudio:
- Investigar los mecanismos celulares y fisiológicos subyacentes al reconocimiento de sí mismo/no-sí mismo en las anémonas marinas.
- Para caracterizar la actividad eléctrica asociada con las respuestas agresivas.
Principales métodos:
- Observación de las interacciones entre las anémonas marinas.
- Registro de la actividad eléctrica en acrorhagi al contacto con individuos singenéicos y alogénicos.
- Análisis de la secreción de las células picantes (nematocistos).
Principales resultados:
- El contacto con tejido extraño (alogénico) desencadena una nueva actividad eléctrica local en el acrorhagi.
- Esta actividad eléctrica suele preceder a la descarga del nematocito.
- No se observó actividad eléctrica durante el contacto con tejido singenético u objetos inanimados.
- La actividad eléctrica parece ser el resultado del reconocimiento de marcadores de superficie alogénicos.
Conclusiones:
- Las anémonas marinas exhiben un sofisticado sistema de reconocimiento que incluye señalización eléctrica.
- Esta actividad eléctrica es un componente clave de la respuesta agresiva a los individuos no-yo.
- Los hallazgos arrojan luz sobre la evolución de los sistemas de reconocimiento inmunológico.
Videos de Conceptos Relacionados
Synaptic Signaling
Neurons communicate at synapses, or junctions, to excite or inhibit the activity of other neurons or target cells, such as muscles. Synapses may be chemical or electrical.
Action Potentials
Overview
Resting Membrane Potential
The relative difference in electrical charge, or voltage, between the inside and the outside of a cell membrane, is called the membrane potential. It is generated by differences in permeability of the membrane to various ions and the concentrations of these ions across the membrane.
The Inside of a Neuron is More Negative
The membrane potential of a cell can be measured by inserting a microelectrode into a cell and comparing the charge to a reference electrode in the extracellular fluid. The...
The Inside of a Neuron is More Negative
The membrane potential of a cell can be measured by inserting a microelectrode into a cell and comparing the charge to a reference electrode in the extracellular fluid. The...
Action Potential
Neurons communicate by firing action potentials—the electrochemical signal that is propagated along the axon. The signal results in the release of neurotransmitters at axon terminals, thereby transmitting information to the nervous system. An action potential is a specific "all-or-none" change in membrane potential that results in a rapid spike in voltage.
Membrane potential in neurons
Neurons typically have a resting membrane potential of about -70 millivolts (mV). When they receive...
Membrane potential in neurons
Neurons typically have a resting membrane potential of about -70 millivolts (mV). When they receive...
Overview of Cell Signaling
Despite the protective membrane that separates a cell from the environment, cells need the ability to detect and respond to environmental changes. Additionally, cells often need to communicate with one another. Unicellular and multicellular organisms use a variety of cell signaling mechanisms to communicate with the environment.
Cells respond to many types of information, often through receptor proteins positioned on the membrane. For example, skin cells respond to and transmit touch...
Cells respond to many types of information, often through receptor proteins positioned on the membrane. For example, skin cells respond to and transmit touch...
Action Potential
Neurons communicate by firing action potentials—the electrochemical signal that is propagated along the axon. The signal results in the release of neurotransmitters at axon terminals, thereby transmitting information to the nervous system. An action potential is a specific "all-or-none" change in membrane potential that results in a rapid spike in voltage.
Membrane potential in neurons
Neurons typically have a resting membrane potential of about -70 millivolts (mV). When they receive...
Membrane potential in neurons
Neurons typically have a resting membrane potential of about -70 millivolts (mV). When they receive...

