  In this work we consider the full interacting effective actions for
fundamental strings and D-branes in arbitrary bosonic type II supergravity
backgrounds. The explicit form of these actions is given in terms of component
fields, up to second order in the fermions. The results take a compact form
exhibiting $\kappa$-symmetry, as well as supersymmetry in a background with
Killing spinors. Also we give the explicit transformation rules for these
symmetries in all cases.
