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Related Concept Videos

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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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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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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Barriers to Effective Communication II01:21

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The barriers to effective communication also include cultural barriers, semantic barriers, gender barriers, and time constraints.
Cultural barriers:
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Non-verbal communication plays a critical role in human interaction, influencing how individuals perceive emotions and psychological states. It operates through four primary channels: facial expressions, eye contact, body language, and touch. These non-verbal cues help convey meaning beyond spoken language and are often culturally influenced.Facial Expressions and Emotional RecognitionFacial expressions are among the most powerful and universal forms of non-verbal communication. Research has...
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Single-cell Microinjection for Cell Communication Analysis
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Electrical Communication in Lymphangions.

Bjørn Olav Hald1, Jorge Augusto Castorena-Gonzalez2, Scott David Zawieja2

  • 1Department of Neuroscience, University of Copenhagen, Copenhagen, Denmark.

Biophysical Journal
|August 26, 2018
PubMed
Summary
This summary is machine-generated.

Lymphatic muscle cell (LMC) electrical coupling and vessel structure are key for initiating and propagating action potential (AP) waves that drive lymph transport. Optimal AP initiation requires high input resistance, while propagation depends on LMC coupling and vessel morphology.

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Area of Science:

  • Physiology
  • Biophysics
  • Cardiovascular Research

Background:

  • Lymphangions contract to propel lymph, driven by lymphatic muscle cell (LMC) action potentials (APs).
  • Electrical coupling within and between LMC layers and its effect on AP wave propagation are not well understood.

Purpose of the Study:

  • To investigate the electrical constraints governing AP initiation and propagation in lymphatic vessels.
  • To elucidate the roles of LMC-LMC coupling, vessel morphology, and LMC excitability in lymph transport.

Main Methods:

  • Combined experimental studies in rat and mouse lymphatic vessels.
  • Mathematical modeling of LMC electrical activity and AP wave dynamics.

Main Results:

  • Myoendothelial coupling is negligible for AP generation; AP waves propagate exclusively along the LMC layer.
  • LMC-LMC resistance is estimated at 2-10 MΩ, influenced by vessel structure and cell overlap.
  • AP wave initiation is favored near valves where LMC density is low.
  • Pacemaker cell current generation requirements are reduced with multi-LMC stimulation or heterogeneous LMC activity.

Conclusions:

  • AP wave initiation depends on high input resistance and sufficient LMC coupling.
  • Vessel morphology and LMC-LMC electrical coupling critically influence AP wave propagation.
  • Findings provide testable predictions on factors affecting lymphatic pumping efficiency.