A. False Forced expiratory efforts by skeletal muscles in the presence of a closed glottis and pylorus are responsible for compressing the stomach.
B. False It is coordinated by a vomiting centre in the medulla oblongata.
C. True Bile pigments enter the gut in the duodenum.
D. True This is one of several types of associated autonomic disturbance.
E. False It is more marked in high obstruction because the copious digestive secretion cannot be absorbed by the gut below the obstruction.