When the bile can not be properly propelled from the not-mechanically-obstructed gallbladder or can not flow out of the end of the common bile duct properly, there is a state of biliary dyskinesia. So, biliary dyskinesia is a dynamically (functional...not fixed mechanical) obstructive, pain-producing disorder.
Two sections each with 20 questions, 35 minutes for each section. Each quantitative reasoning section (also common called the Math GRE sections) contains a mix of multiple choice, quantitative analysis, and user input questions.
Additionally, the general GRE is section-level adaptive, which means your score on the first sections of Verbal Reasoning and Quantitative Reasoning influences the difficulty level of the questions on the second sections. GRE subject Tests, because they are taken on paper, are NOT adaptive.