家鸡肠系膜前动脉纵行肌的研究。
Studies on the longitudinal muscle of the anterior mesentric artery of the domestic fowl.
作者信息
Bolton T B
出版信息
J Physiol. 1968 May;196(2):273-81. doi: 10.1113/jphysiol.1968.sp008506.
Abstract
- A simple, isolated preparation is described in which the activity of the longitudinal muscle of the anterior mesenteric artery of the domestic fowl is recorded isotonically.2. The longitudinal muscle of the anterior mesenteric artery exhibited tone and marked spontaneous activity. Maximal shortening of this muscle was equal to about 60% of its resting length.3. Acetylcholine in low concentrations produced powerful contractions of the muscle, whereas low concentrations of catecholamines produced relaxation by an action on beta-receptors; much larger concentrations of adrenaline or noradrenaline contracted the muscle. A pharmacological analysis of the responses to electrical stimulation and to agonist drugs indicated that the muscle was supplied by excitatory, cholinergic nerves and by inhibitory, adrenergic nerves.
摘要
本文描述了一种简单的离体标本制备方法，用于记录家鸡肠系膜前动脉纵行肌的等张收缩活动。
肠系膜前动脉的纵行肌呈现张力并具有明显的自发活动。该肌肉的最大缩短幅度约等于其静息长度的60%。
低浓度的乙酰胆碱可使肌肉产生强烈收缩，而低浓度的儿茶酚胺通过作用于β受体产生舒张作用；更高浓度的肾上腺素或去甲肾上腺素则使肌肉收缩。对电刺激和激动剂药物反应的药理学分析表明，该肌肉由兴奋性胆碱能神经和抑制性肾上腺素能神经支配。
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