Question

in APA format does one need to cite at the end of each paraphrased sentence or does one citation at the end of the paragraph suffice?

Answer 1

If the paraphrased quote comes from the same source as the rest of the paragraph, then one parenthetical citation at the end of the paragraph should suffice or until you use information from another source.
For example:
Writing is a productive activity for students. Dr. Writesalot talks about writing in his article as "a hobby that can free the minds of students everywhere (Writesalot, 2)." He then goes on to discuss the dangerous use of "textspeak" on the internet (Writesalot, 2).
Having the same source citation for that paragraph is repetitive, and you would need to have the source at the end to indicate that the rest information came from that source.