The uri is only a description about the WFS service.
For WFS it have some operations for example:
I tried to build a DescribeFeatureType link for the sample type "medford:bikelanes" like this:
It looks contains more detail information about the element for this type.
And I think the GetFeature function is what you need, but the parameter is more complex than the DescribeFeatureType, so I hadn't build a sample link for you.
You can get more detail information here: http://www.opengeospatial.org/standards/wfs
Wish that's helpful.