A 59-year-old male presented with palpitation, weakness, seated<br/>aspiration, and a diagnosis of chronic congestive heart failure. He<br/>was treated with cardiac glycosides. Which of the following is the<br/>reason for the patient's use of cardiac glycosides() A: Directly activating inhibitory porton pump B: Inhibit H+-K+-ATPase C: Directly excite the heart D: Inhibit Na+-K+-ATPase E: Prolong the opening time of calcium channel

The mechanism of positive inotropic effect produced by cardiac glycosides is to increase intracellular concentration of A: Na+ B: K+ C: Cl- D: Mg2+ E: Ca2+

苷类(glycosides)是糖或(____)酸等与另一非糖物质通过糖的端基碳原子连接而成的化合物。茄子、马铃薯等茄科的(茄)苷,配基为茄碱(龙葵碱)。蚕豆毒素(favism),含有( ____ )葡糖苷(vicine)和伴嘧啶核苷(covicine)。

Diarrhea from infection or malnutrition is the world's most prevalent killer of children. A 2-month-old Caucasian girl develops chronic diarrhea and liver inflammation in early infancy when the mother begins using formula that includes corn syrup. Evaluation of the child demonstrates sensitivity to fructose in the diet. Which of the following glycosides contains fructose and therefore should be avoided when feeding or treating this infant A: Sucrose B: Ouabain C: Lactose D: Maltose E: Streptomycin