Select the structures that are part of the larynx. (Select all that apply)

A. Ileoappendix: Not a standard anatomical valve -the term suggests a junction with the appendix but is not the valve between small and large intestine.
B. Pyloric sphincter: The pyloric sphincter is between the stomach and duodenum, not at the ileum–cecum junction.
C. Duodenorenal:Not a recognized valve -describes a relation between duodenum and kidney region, not a valve.
D. Ileocecal:The ileocecal (ileocecal/ileocecal) valve is the sphincter at the junction of the terminal ileum and cecum that controls flow of chyme into the large intestine.

A. CCK is released from the duodenum to promote liver and pancreatic secretion.:CCK (cholecystokinin) is released by duodenal/jejunal enteroendocrine cells and stimulates pancreatic enzyme secretion and gallbladder contraction -this supports digestion but describes a hormonal control mechanism rather than a structural adaptation of the small intestine itself.
B. Large surface area due to the presence of the plicae circulares, villi, and microvilli.:The small intestine’s mucosal folds (plicae circulares), finger-like villi, and microscopic microvilli (brush border) massively increase surface area for absorption.
C. Acid secretions from the stomach are neutralized in the duodenum.:The duodenum receives bicarbonate-rich pancreatic secretions and bile which neutralize gastric acid to create an optimal pH for intestinal enzymes -this is an important functional adaptation that facilitates digestion/absorption but is secondary to the structural surface-area adaptations.
D. The small intestine has haustra and rugae both help in nutrient absorption.:Haustra are sacculations of the large intestine (colon) and rugae are folds in the stomach -neither are features of the small intestine, so this statement is incorrect.