Potassium initiates vasodilatation induced by a single skeletal muscle contraction in hamster cremaster muscle
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چکیده
منابع مشابه
Shock and active vasodilatation in skeletal muscle.
The vasodilatation which occurs in the skeletal muscle of the cat following the stimulation of some fibres of the sympathetic nerves and that which follows the intravenous injection of small doses of adrenaline takes place in different vessels. It is, therefore, possible to obtain an augmented effect when both the above stimuli are applied simultaneously. Both mechanisms must be blocked to comp...
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Skeletal muscle blood flow increases rapidly with exercise onset, but little is known of where or how the rapid onset of vasodilation (ROV) is governed within the microcirculation. In the retractor muscle of anesthetized hamsters (n = 26), we tested the following: 1) where in the resistance network ROV occurred, 2) how microvascular responses were affected by the duration of contraction, and 3)...
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The intrinsic activating factors that induce transcription of heat shock protein 72 (HSP72) in skeletal muscle following exercise remain unclear. We hypothesized that the cytosolic Ca(2+) transient that occurs with depolarization is a determinant. We utilized intact, single skeletal muscle fibers from Xenopus laevis to test the role of the cytosolic Ca(2+) transient and several other exercise-r...
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Maximal whole body exercise leads skeletal muscle blood flow to markedly increase to match metabolic demands, a phenomenon termed exercise hyperaemia that is accomplished by increasing vasodilation. However, local vasodilatory mechanisms in response to skeletal muscle contraction remain uncertain. This review highlights metabolic vasodilators released from contracting skeletal muscle, endotheli...
متن کاملMultiple dilator pathways in skeletal muscle contraction-induced arteriolar dilations.
To determine whether nitric oxide (NO), adenosine (Ado) receptors, or ATP-sensitive potassium (K(ATP)) channels play a role in arteriolar dilations induced by muscle contraction, we used a cremaster preparation in anesthetized hamsters in which we stimulated four to five muscle fibers lying perpendicular to a transverse arteriole (maximal diameter approximately 35-65 microm). The diameter of th...
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ژورنال
عنوان ژورنال: The Journal of Physiology
سال: 2007
ISSN: 0022-3751
DOI: 10.1113/jphysiol.2007.130013