试述雌激素的生理功能?

急性肾衰竭血液透析指证为

A．血尿素氮＞18.6mmol/L、肌酐＞409μmol/L、血钾＞5.0mmol/L

B．血尿素氮＞20.6mmol/L、肌酐＞509μmol/L、血钾＞6.0mmol/L

C．血尿素氮＞21.6mmol/L、肌酐＞609μmol/L、血钾＞6.0mmol/L

D．血尿素氮＞28.6mmol/L、肌酐＞609μmol/L、血钾＞7.0mmol/L

E．血尿素氮＞28.6mmol/L、肌酐＞709μmol/L、血钾＞6.0mmol/L