问题 单项选择题

A client with heart failure asks the nurse about the reason for taking enalapril maleate. The nurse would explain that the medication is prescribed for which of the following reason

A.Lower the blood pressure by increasing peripheral vasoconstriction.

B.Lower the heart rate by slowing the conduetion system.

C.Block the conversion of angiotensin Ⅰ to angiotensin Ⅱ.

D.Increase myocardial contractility, thereby improving cardiac output.

答案

参考答案:C

解析:Enalapril maleate is an angiotensin-converting enzyme (ACE) inhibitor that prevents conversion of angiotensin Ⅰ to angiotensin Ⅱ. Angiotensin Ⅱ is a potent vasoconstrictor and also contributes to aldosterone secretion. Thus, enalapril decreases blood pressure through systemic vasodilation.

单项选择题
填空题

DSEG SEGMENT  DAT    DB         5,13,4,-2,6,23,44,-1,29,-3  CNT    DW         $-DAT  DSEG   ENDS  SSEG   SEGMENT       STACK       DB          256DUP(0)  SSEG   ENDS  CSEG   SEGMENT       ASSUME        DS:DSEGSS:SSEGCS:CSEG  START   PROC         FAR  PUSH   DS        XOR         AX,AX        PUSH        AX        MOV         AX,DSEG        MOV         DS,AX        XOR         AX,AX        MOV        BX,OFFSETDAT        MOV         CX,CNT  LP:    TEST        [BX],01H        JZ         NEXT        INC        AH        ADD        AL,[BX]  NEXT:   INC        BX        LOOP       LP        RET  START   ENDP  CSEG   ENDS       END         START【 】

若将程序中的JZNEXT指令修改为JNZNEXT指令,则程序执行结束后,AX寄存器中的内容是 【 】 (用十六进制表示)。