The duodenum is considered the meeting point for digestion because:
It produces digestive enzymes
it receives secretions from the liver, gallbladder, and pancreas
it is part of the large intestine
It has villi and microvilli
The Correct Answer is D
A. It produces digestive enzymes
While the duodenum may activate enzymes, it does not produce major digestive enzymes itself. Most digestive enzymes come from the pancreas and intestinal glands.
B. It receives secretions from the liver, gallbladder, and pancreas
The duodenum is the first part of the small intestine and receives bile from the liver and gallbladder and digestive enzymes from the pancreas, making it a central site for digestive processes to begin in earnest.
C. It is part of the large intestine
The duodenum is part of the small intestine, not the large intestine.
D. It has villi and microvilli
While the duodenum does have villi, this feature is not unique to it—all segments of the small intestine have villi. This is not the reason it is considered the "meeting point" for digestion.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Gallbladder, production of bile
The liver produces bile, while the gallbladder stores and releases it. Villi are not located here.
B. Small intestine, absorption
Villi are tiny finger-like projections in the small intestine that increase surface area for absorption of nutrients.
C. Pancreas, release of hormones
The pancreas does release hormones (like insulin), but it does not contain villi.
D. Large intestine, excretion
The large intestine is responsible for water absorption and feces formation, not nutrient absorption through villi.
Correct Answer is A
Explanation
A. Lifestyle modification is the first-line treatment, including diet and physical activity, followed by pharmacotherapy if weight loss goals are not met after 6 months. Surgery is reserved for those with a BMI ≥35 kg/m².
Current guidelines emphasize lifestyle modification (diet, exercise, behavior therapy) as the first-line approach. If insufficient, pharmacotherapy may be added. Surgery is typically reserved for individuals with BMI ≥40, or BMI ≥35 with comorbidities, such as diabetes.
B. Pharmacotherapy is recommended as the first-line treatment for individuals with a BMI ≥25 kg/m², with lifestyle changes and surgery considered secondary options.
BMI ≥25 is considered overweight, and lifestyle changes, not medications, are the first-line intervention at this level.
C. Lifestyle modifications, including diet and exercise, are secondary treatments, with pharmacotherapy being the first-line approach for all individuals with a BMI ≥30 kg/m². Surgery is recommended for those with a BMI ≥40 kg/m².
Lifestyle modification is first-line, even for BMI ≥30. Pharmacotherapy is used only if lifestyle changes are insufficient.
D. Surgical interventions should be considered the first-line treatment for individuals with a BMI ≥30 kg/m², with lifestyle modifications and pharmacotherapy used only after surgery.
Surgery is not first-line for a BMI of ≥30. It is considered only for severe obesity or obesity with comorbidities after other methods fail.
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