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Related Concept Videos

Synaptic Signaling01:12

Synaptic Signaling

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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.
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Synaptic Signaling01:09

Synaptic Signaling

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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.
Most synapses are chemical, meaning an electrical impulse or action potential spurs the release of chemical messengers called neurotransmitters. The neuron sending the signal is called the presynaptic neuron, and the neuron receiving the signal is the postsynaptic neuron.
The presynaptic neuron fires an action potential that...
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Energy-releasing Steps of Glycolysis01:28

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Glycolysis is divided into two phases based on whether energy is utilized or released. While the first phase consumes ATP, the second phase produces energy in the form of ATP and NADH. The energy is released over a sequence of reactions that turns G3P into pyruvate. The energy-releasing phase—steps 6-10 of glycolysis—occurs twice, once for each of the two 3-carbon sugars produced during steps 1-5 of the first phase.
The first energy-releasing step—the 6th step of glycolysis...
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Integration of Synaptic Events01:28

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Synaptic integration mainly includes the summation of graded potentials. Graded potentials, regardless of their type, cause subtle alterations in membrane voltage, resulting in either depolarization or hyperpolarization. These incremental changes, when combined or summed, can propel the neuron toward its threshold. Consider, for example, a membrane experiencing a +15 mV shift, causing it to depolarize from -70 mV to -55 mV. In this scenario, graded potentials govern the membrane's ability to...
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Modified-Release Drug Delivery Systems: Drug Release Characteristics01:22

Modified-Release Drug Delivery Systems: Drug Release Characteristics

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Drug release from modified-release dosage forms is designed to achieve specific therapeutic effects by controlling the rate and extent of drug release. The classification of these drug release systems is based on key pharmacokinetic assumptions: drug disposition follows first-order kinetics, drug release is the rate-limiting step in absorption, and the released drug is rapidly and completely absorbed.There are four major models of drug release patterns. The first model is the slow zero-order...
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ATP Energy Storage and Release01:31

ATP Energy Storage and Release

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ATP is a highly unstable molecule. Unless quickly used to perform work, ATP spontaneously dissociates into ADP and inorganic phosphate (Pi), and the free energy released during this process is lost as heat. The energy released by ATP hydrolysis is used to perform work inside the cell and depends on a strategy called energy coupling. Cells couple the exergonic reaction of ATP hydrolysis with endergonic reactions, allowing them to proceed.
One example of energy coupling using ATP involves a...
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Related Experiment Video

Updated: Feb 13, 2026

Studying Synaptic Vesicle Pools using Photoconversion of Styryl Dyes
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Clearing the way for synaptic vesicle release.

Caitlin Sedwick

    The Journal of General Physiology
    |March 21, 2018
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    Summary
    This summary is machine-generated.

    This study reveals endocytosis supports synaptic vesicle release in ribbon synapses. This finding is crucial for understanding neurotransmission at these specialized neuronal junctions.

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    Related Experiment Videos

    Last Updated: Feb 13, 2026

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    Measuring Synaptic Vesicle Endocytosis in Cultured Hippocampal Neurons
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    Area of Science:

    • Neuroscience
    • Cell Biology

    Background:

    • Ribbon synapses are specialized structures crucial for rapid and sustained neurotransmitter release in sensory systems.
    • The precise mechanisms regulating synaptic vesicle release at these synapses are not fully understood.

    Discussion:

    • This research demonstrates a novel role for endocytosis in facilitating synaptic vesicle release at ribbon synapses.
    • The study highlights the dynamic interplay between endocytic pathways and exocytosis in maintaining synaptic function.

    Key Insights:

    • Endocytosis actively contributes to the pool of readily releasable synaptic vesicles at ribbon synapses.
    • This process is essential for efficient neurotransmission in sensory neurons.

    Outlook:

    • Further investigation into the molecular machinery of endocytosis at ribbon synapses could reveal new therapeutic targets.
    • Understanding these mechanisms is vital for addressing neurological disorders affecting sensory processing.