  Inclusive quasielastic response functions are calculated for electron
scattering in a relativistic model including momentum dependent scalar and
vector mean fields. The momentum dependence of the mean fields is taken from
Dirac optical fits to proton nucleus scattering and is important in describing
data at momentum transfers of 1 GeV/c or larger. Our simple model is applicable
for quasielastic scattering over a large range of momentum transfers.
