NTP Chronic Disease & Nutrition 3 — Questions and Answers
Question 1: In autoimmune conditions, which gut-related mechanism is considered a primary driver of immune dysregulation?
- Overproduction of secretory IgA
- Increased intestinal permeability (leaky gut) (Correct answer)
- Excessive production of short-chain fatty acids
- Hypochlorhydria leading to protein malabsorption
Correct answer: Increased intestinal permeability (leaky gut)
Increased intestinal permeability allows antigens to enter systemic circulation, triggering immune responses that can cross-react with self-tissue.
Question 2: Which omega-3 fatty acid is most directly responsible for producing anti-inflammatory resolvins and protectins?
- Alpha-linolenic acid (ALA)
- Eicosapentaenoic acid (EPA)
- Docosahexaenoic acid (DHA) (Correct answer)
- Linoleic acid (LA)
Correct answer: Docosahexaenoic acid (DHA)
DHA is the primary substrate for synthesis of resolvins and protectins, lipid mediators that actively resolve inflammation.
Question 3: A client with hypothyroidism is most likely to have suboptimal levels of which nutrient critical for thyroid hormone synthesis?
- Vitamin B12
- Iodine (Correct answer)
- Vitamin C
- Iron
Correct answer: Iodine
Iodine is a structural component of thyroxine (T4) and triiodothyronine (T3), making it essential for thyroid hormone production.
Question 4: Which dietary intervention has the strongest evidence for reducing systolic blood pressure?
- Increasing dietary calcium only
- Following the DASH diet with sodium restriction (Correct answer)
- High-dose vitamin C supplementation
- Eliminating all dietary fat
Correct answer: Following the DASH diet with sodium restriction
The DASH diet combined with sodium restriction consistently produces clinically significant reductions in blood pressure across populations.
Question 5: Metabolic syndrome is defined by a cluster of conditions that include all of the following EXCEPT:
- Elevated fasting blood glucose
- High HDL cholesterol (Correct answer)
- Elevated triglycerides
- Abdominal obesity
Correct answer: High HDL cholesterol
Metabolic syndrome criteria include low HDL (not high HDL), along with elevated glucose, triglycerides, blood pressure, and waist circumference.
Question 6: Which fermented food provides the most diverse range of probiotic species beneficial for gut microbiome diversity in chronic disease prevention?
- Pasteurized yogurt
- Commercial probiotic supplements
- Traditional lacto-fermented vegetables like sauerkraut (Correct answer)
- Fortified breakfast cereals
Correct answer: Traditional lacto-fermented vegetables like sauerkraut
Traditional lacto-fermented vegetables contain naturally diverse live bacterial cultures that survived the fermentation process and are not heat-killed.
Question 7: In osteoporosis prevention, vitamin D's primary role in bone health is best described as:
- Directly stimulating osteoblast bone formation
- Enhancing intestinal calcium and phosphorus absorption (Correct answer)
- Inhibiting parathyroid hormone secretion directly
- Providing structural mineral content to bone matrix
Correct answer: Enhancing intestinal calcium and phosphorus absorption
Vitamin D (as calcitriol) upregulates calcium-binding proteins in the intestine, dramatically increasing calcium absorption efficiency.
NTP Chronic Disease & Nutrition 3
In autoimmune conditions, which gut-related mechanism is considered a primary driver of immune dysregulation?