For us in semester 2, the exam didn't have the long extended experimental design question that was there in semester 1, it instead had four short answer questions that were to do different parts of experimental design (as opposed to one question about one experiment). There were also 20 MC questions as opposed to 8 in semester 1, but again, of the MC questions, half covered experimental design. The SA questions that were around in semester 1, testing more physiological concepts wasn't really there in semester 2. Overall, even without the extended response, I think the semester 2 exam tested more about the experimental design part of the subject, as opposed to the physiology concepts side.
Exam format for semester 1 - 8 MC, 3 SA, 1 extended response
Exam format for semester 2 - 20 MC, 4 SA.
Whether they change it again, I don't know. But either way you'll be fine as long as you keep up.