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Related Concept Videos

Contact-dependent Signaling01:19

Contact-dependent Signaling

Contact-dependent signaling, as the name suggests, requires that communicating cells be in direct contact with each other. This is achieved either through receptor-ligand interactions or by specialized cytoplasmic channels that allow the flow of small molecules between cells. In animal cells, channels called gap junctions facilitate contact-dependent signaling in certain tissues, whereas, plasmodesmata perform a similar function in plants.
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Plasticity is the property where an object loses its elasticity and undergoes irreversible deformation, even after the deformation forces are eliminated. If a material deforms irreversibly without increasing stress or load, then this is called ideal plasticity. For example, when a force is applied to an aluminum rod, it changes its shape, but it does not return to its original shape once the force is removed. Plastic deformation or ductility is thus a permanent deformation or change in the...
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It is essential to understand how structural members behave under plastic deformation when the bending stress exceeds the material's yield strength. This state of deformation permanently alters the shape of the member, in contrast to the linear elastic behavior observed before yielding. The strain at any point in the member is expressed in terms of maximum strain. Notably, the neutral axis, which coincides with the centroid during elastic bending, shifts away from the centroid under plastic...
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Related Experiment Video

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Fabrication Process of Silicone-based Dielectric Elastomer Actuators
10:32

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Published on: February 1, 2016

Postsynaptic signaling and plasticity mechanisms.

Morgan Sheng1, Myung Jong Kim

  • 1Picower Center for Learning and Memory, RIKEN-MIT Neuroscience Research Center, Howard Hughes Medical Institute, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. msheng@mit.edu

Science (New York, N.Y.)
|October 26, 2002
PubMed
Summary
This summary is machine-generated.

Glutamate receptors in brain synapses activate signaling pathways, influencing synaptic plasticity. Understanding these complex molecular mechanisms is crucial for brain function.

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Area of Science:

  • Neuroscience
  • Molecular Biology
  • Synaptic Physiology

Background:

  • Excitatory synapses utilize glutamate receptors on the postsynaptic membrane.
  • Glutamate receptor activation initiates intracellular biochemical pathways.
  • Synaptic activity patterns modulate synaptic strength and duration.

Purpose of the Study:

  • To elucidate the molecular mechanisms of postsynaptic signaling.
  • To understand the basis of synaptic plasticity.
  • To explore how different synaptic activities lead to varied signaling patterns.

Main Methods:

  • Investigated glutamate receptor function in postsynaptic neurons.
  • Analyzed biochemical pathways activated by receptor stimulation.
  • Examined the relationship between synaptic activity patterns and signaling outcomes.

Main Results:

  • Specific glutamate receptors mediate signal transduction.
  • Diverse synaptic activities trigger distinct postsynaptic signals.
  • These signals correlate with short- and long-term synaptic modifications.

Conclusions:

  • Complex molecular mechanisms govern postsynaptic signaling.
  • These mechanisms underlie synaptic plasticity.
  • Further research is needed to fully emerge the intricacies of these processes.