Which of the following statements about the gastrointestinal system are TRUE?
A) After nutrient absorption, blood returns directly to the heart for recirculation.
B) The duodenum and ileum make up the bulk of the small intestine.
C) The blood absorbs nutrients ingested through the gastrointestinal tract.
D) Mechanical digestion takes place in the duodenum, jejunum, and ileum.
Answer: C
Health Professions
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In a person breathing room air (and with all else being normal), if the alveolar PCO2 rises from 40 to 70 mm Hg, what would you expect?
a. PAO2 to fall by approximately 30 mm Hg b. PAO2 to fall by approximately 40 mm Hg c. PAO2 to rise by approximately30 mm Hg d. PAO2 to rise by approximately 40 mm Hg
Health Professions
The heart and lungs are located in the:
A. dorsal cavity. B. pelvic cavity. C. abdominal cavity. D. thoracic cavity.
Health Professions