Basal Potassium Stimulation
Basal Potassium Stimulation - Related Videos
07:59
Measurement of Basal and Forskolin-stimulated Lipolysis in Inguinal Adipose Fat Pads
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Cited by 10 •
2017
This protocol describes the method of determining basal and forskolin-stimulated lipolysis in inguinal fat pads obtained from normal chow diet (NCD) or high fat diet (HFD) ± capsaicin fed wild type mice. As an index for lipolysis, glycerol release was measured from inguinal adipose fat pads.
08:31
FM Dye Cycling at the Synapse: Comparing High Potassium Depolarization, Electrical and Channelrhodopsin Stimulation
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Cited by 7 •
2018
Synaptic vesicle (SV) cycling is the core mechanism of intercellular communication at neuronal synapses. FM dye uptake and release are the primary means of quantitatively assaying SV endo- and exocytosis. Here, we compare all the stimulation methods to drive FM1-43 cycling at the Drosophila neuromuscular junction (NMJ) model synapse.
13:31
Soil Nutrient Analysis: Nitrogen, Phosphorus, and Potassium
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2023
Source: Laboratories of Margaret Workman and Kimberly Frye - Depaul University In this experiment, three soil macronutrients are chemically extracted, combined with color-based reagents, then analyzed using color to determine the nutrient concentration present in the soil sample. Nitrogen, phosphorus, and potassium are the main components of soil fertilizer. These methods isolate each nutrient from the soil into a solution that can be analyzed using turbidity and color to determine the...
01:26
Regulation of Sodium and Potassium
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2024
The regulation of sodium and potassium ion concentrations in the human body is a complex process governed primarily by hormones such as aldosterone, antidiuretic hormone (ADH), and atrial natriuretic peptide (ANP). Sodium Regulation Sodium ions make up approximately 90% of extracellular cations, with a normal blood plasma concentration of 136–148 mEq/L. A decrease in blood volume and pressure triggers the release of renin from granular cells in the juxtaglomerular complex (JGC), primarily in...
03:41
Measurement of Evoked Potassium Ion Concentration Dynamics in Coronal Hippocampal Slices
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2025
The video demonstrates evoked potassium ion concentration dynamics on electrical stimulation of mouse coronal hippocampal brain slices. A bipolar stimulating electrode is inserted into the stratum radiatum of the CA3 region in the hippocampus, and a potassium-ion selective electrode is placed in the CA1 stratum radiatum. The electrical stimulation causes an action potential, resulting in potassium ion release. Finally, the lack of evoked potassium ion response in the presence of an inhibitory...
FAQs
The key electrical effect is a reduction in the transmembrane potassium gradient. When extracellular potassium rises in a controlled manner, the neuronal membrane depolarizes, moving it toward conditions that favor activation of voltage-gated calcium channels. This links the imposed ionic change to a measurable change in neuronal responsiveness.
Depolarization activates voltage-gated calcium channels, allowing calcium to enter the neuron. That influx promotes neurotransmitter release, connecting the membrane’s electrical response with chemical signaling. Measuring the resulting functional response therefore provides information about how neuronal excitability is translated into synaptic or transmitter-related output in the preparation.
The controlled increase establishes a defined ionic challenge rather than an unspecified change in the surrounding environment. Because the preparation is examined under near-baseline conditions before stimulation, the response can be related to the imposed depolarizing condition. This supports assessment of how neuronal excitability and chemical signaling change relative to basal function.
A typical comparison begins with a basal measurement from the neural preparation, followed by a controlled increase in extracellular potassium and measurement of the resulting functional response. Researchers then compare the stimulated and basal conditions. This organization helps identify changes in neurotransmitter dynamics or neuronal function associated with the potassium challenge.
Basal Potassium Stimulation can be applied to neural tissue or to isolated preparations, depending on the experimental question. Neural tissue allows investigators to examine responses in a broader biological context, while an isolated preparation can support focused analysis of neuronal excitability, synaptic transmission, or chemical signaling under defined experimental conditions.
Researchers can use the method to examine how drugs, disease states, or other experimental manipulations alter neurotransmitter dynamics and neuronal function. Comparing basal and potassium-stimulated responses shows whether a manipulation changes the preparation’s response to neuronal activation, making the approach useful for studying altered excitability or signaling.
A difference between the two conditions can indicate how effectively the preparation responds to a depolarizing challenge compared with its near-baseline state. The comparison may reveal changes in neuronal excitability, synaptic transmission, or chemical signaling. In studies involving drugs or disease states, these response differences help characterize altered neuronal function.