SQL & PL/SQL

I have cursor with more then one default parameter. If don't pass any, all default are aplied. If I pass all, then mine are used. But what if I want to pass only one of many? Can I do that in Oracle PL/SQL?

Can I do something like below using named parameters which doesn't compile (but work for example in Visual Studio)? I would like to pass only upper limit - in my case display only DepNo 10.

Declare
  Cursor c_Emp(p_MinDeptNo Number := 10, p_MaxDeptNo Number := 30) Is
    Select *
    From Emp
    Where DeptNo Between p_MinDeptNo And p_MaxDeptNo;
Begin
  For rec in c_Emp(p_MaxDeptNo := 10) Loop
    DBMS_OutPut.Put_Line('Emp: ' || rec.Ename); -- Process records
  End Loop;
End;
/

BB