Results 31 to 40 of about 3,686,002 (351)

Presynaptic Calcium Channel Open Probability and Changes in Calcium Influx Throughout the Action Potential Determined Using AP-Waveforms

open access: yesFrontiers in Synaptic Neuroscience, 2020
Action potentials arriving at a nerve terminal activate voltage-gated calcium channels and set the electrical driving force for calcium entry which affects the amount and duration of neurotransmitter release.
Matthew S. Scarnati   +6 more
doaj   +1 more source

Pancreatic β Cell CaV Channels in Health and Disease

open access: yes, 2022
Multiple types of voltage-gated calcium (CaV) channels including CaV1.2, CaV1.3, CaV2.1, CaV2.2, CaV2.3, CaV3.1, and CaV3.2 operate in electrically excitable β cells under both physiological and pathophysiological conditions.
Berggren, P-O   +5 more
core   +1 more source

Vacuolar calcium channels [PDF]

open access: yesJournal of Experimental Botany, 2007
The central vacuole is the largest Ca2+ store in a mature plant cell. Ca2+ release from this store contributes to Ca2+-mediated intracellular signalling in a variety of physiological responses. However, the routes for vacuolar Ca2+ release are not well characterized.
I I, Pottosin, G, Schönknecht
openaire   +2 more sources

Functional Coupling of Cav2.3 and BK Potassium Channels Regulates Action Potential Repolarization and Short-Term Plasticity in the Mouse Hippocampus

open access: yesFrontiers in Cellular Neuroscience, 2019
Voltage-gated ion channels are essential for signal generation and propagation in neurons and other excitable cells. The high-voltage activated calcium-channel Cav2.3 is expressed throughout the central and peripheral nervous system, and within CA1 ...
Jakob J. Gutzmann   +2 more
doaj   +1 more source

Voltage‐gated calcium channels and their auxiliary subunits: physiology and pathophysiology and pharmacology

open access: yesJournal of Physiology, 2016
Voltage‐gated calcium channels are essential players in many physiological processes in excitable cells. There are three main subdivisions of calcium channel, defined by the pore‐forming α1 subunit, the CaV1, CaV2 and CaV3 channels.
A. Dolphin
semanticscholar   +1 more source

SLO BK Potassium Channels Couple Gap Junctions to Inhibition of Calcium Signaling in Olfactory Neuron Diversification. [PDF]

open access: yesPLoS Genetics, 2016
The C. elegans AWC olfactory neuron pair communicates to specify asymmetric subtypes AWCOFF and AWCON in a stochastic manner. Intercellular communication between AWC and other neurons in a transient NSY-5 gap junction network antagonizes voltage ...
Amel Alqadah   +8 more
doaj   +1 more source

Calcium channels for endocytosis [PDF]

open access: yesThe Journal of Physiology, 2014
Exocytosis and endocytosis need to be tightly balanced to keep cell surface area constant. This is of particular relevance for presynaptic terminals, where endocytosis needs to compensate for the ongoing exocytosis of synaptic vesicle to ultimately guarantee reliable synaptic transmission.
openaire   +2 more sources

Lack of direct evidence for a functional role of voltage-operated calcium channels in juxtaglomerular cells [PDF]

open access: yes, 1990
In this study we have examined the role of voltage-gated calcium channels in the regulation of calcium in juxtaglomerular cells. Using a combination of patch-clamp and single-cell calcium measurement we obtained evidence neither for voltage-operated ...
Skott, O.   +5 more
core   +1 more source

Activation of Calcium Channels

open access: yesBiophysical Journal, 1984
Activation of Ca channels has been described as a Hodgkin-Huxley process in which the time constants have ratios of two or greater (1, 2, 3) or as a three-state linear sequential process with two very different time constants (4). We examined activation by measuring the turn-on and turn-off of macroscopic Ca currents and the discharge of single Ca ...
Brown, Arthur M.   +2 more
openaire   +2 more sources

Membrane Currents in Airway Smooth Muscle: Mechanisms and Therapeutic Implications

open access: yesCanadian Respiratory Journal, 1997
Electrophysiological and pharmacological techniques were used to characterize the membrane conductance changes underlying spasmogen-evoked depolarization in airway smooth muscle (ASM).
Luke J Janssen
doaj   +1 more source

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