单选题 The nurse is administering magnesium sulfate to a client with preeclampsia. The nurse explains to the client that this drug is given for which of the following reason?

A. To prevent seizures.
B. To reduce blood pressure.
C. To slow the process of labor.
D. To increase diuresis.

【正确答案】 A

【答案解析】The chemical makeup of magnesium is similar to that of calcium and, therefore, magnesium will act like calcium in the body. As a result, magnesium will block seizure activity in a hyperstimulated neurologic system by interfering with signal transmission at the neural musculature junction. Reducing blood pressure, slowing labor, and increasing diuresis are secondary effects of magnesium.