The _____________ regulates the flow of contents from the stomach to the duodenum.
fundus
gastric rugae
pyloric sphincter
antrum
The Correct Answer is C
A. Fundus is the upper part of the stomach, which does not regulate the flow of contents to the duodenum.
B. Gastric rugae are folds in the stomach lining that allow for expansion but do not regulate the flow of contents to the duodenum.
C. Pyloric sphincter controls the flow of partially digested food (chyme) from the stomach into the duodenum.
D. Antrum is the lower portion of the stomach that helps in mixing and grinding food but does not directly regulate its flow to the duodenum.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Minerals are absorbed directly into the bloodstream, not through lacteals.
B. Glucose is absorbed directly into the bloodstream through capillaries, not through lacteals.
C. Amino acids are absorbed into the bloodstream through capillaries, not through lacteals.
D. Triglycerides are absorbed by the lacteals in the small intestine. Lacteals are lymphatic vessels that transport absorbed lipids (including triglycerides) from the digestive tract.
Correct Answer is B
Explanation
Pancreatic juice and bile are indeed secreted into the duodenum. Pancreatic juice, which contains digestive enzymes, is released from the pancreas, while bile, which emulsifies fats, is secreted from the liver and stored in the gallbladder before being released into the duodenum.
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