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钙参与平滑肌的收缩。目前已知平滑肌存在两种与肌收缩有关的钙通道,即电压依存钙通道和受体联结钙通道,而器官钙拮抗剂和硝普钠可选择性地抑制这些钙通道,因此可用来检查平滑肌的类型。本文着重就平滑肌钙通道、钙通道拮抗剂与消化道两个问题做一综述。
Calcium participates in smooth muscle contraction. It is currently known that there are two types of calcium channels involved in muscle contraction in smooth muscle, namely voltage-dependent calcium channels and receptor-linked calcium channels. Organ calcium antagonists and sodium nitroprusside selectively inhibit these calcium channels and can therefore be used to examine smooth muscle type. This article focuses on smooth muscle calcium channels, calcium channel antagonists and digestive tract are two issues to be reviewed.