To prevent external rotation of the client’s hips while he is lying on his back, it would be best for the nurse to place

A. firm pillows under the length of his legs.
B. sandbags alongside his legs from knees to ankles.
C. troehanter rolls alongside his legs from ilium to midthigh.
D. a footboard that supports his feet in the normal anatomic position.

以下关于钠泵生理作用的叙述，哪项是错误的（）

A、逆浓度差将进入细胞内的Na+移出膜外

B.顺浓度差使细胞膜外的K+转入膜内

C、阻止水分进入细胞

D.建立离子势能储备已是神经、肌肉等组织具有兴性的基础