NTP Blood Sugar Regulation & Metabolic Balance 2 — Questions and Answers
Question 1: Reactive hypoglycemia is characterized by:
- Chronically elevated fasting blood glucose levels
- Blood glucose drops occurring 2–4 hours after a high-carbohydrate meal (Correct answer)
- Inability of the pancreas to produce glucagon
- Fasting blood glucose persistently below 50 mg/dL
Correct answer: Blood glucose drops occurring 2–4 hours after a high-carbohydrate meal
Reactive hypoglycemia occurs when blood sugar drops too low 2–4 hours after eating, often due to an exaggerated insulin release in response to a carbohydrate-rich meal.
Question 2: How does soluble dietary fiber affect postprandial blood sugar regulation?
- It directly raises blood glucose by fermenting into simple sugars in the small intestine
- It slows gastric emptying and glucose absorption, reducing postprandial blood sugar spikes (Correct answer)
- It stimulates pancreatic insulin secretion directly
- It binds to insulin receptors to enhance glucose uptake independently
Correct answer: It slows gastric emptying and glucose absorption, reducing postprandial blood sugar spikes
Soluble fiber forms a viscous gel in the digestive tract that slows gastric emptying and the absorption of glucose, resulting in a more gradual rise in blood sugar and reduced insulin demand.
Question 3: Hemoglobin A1c (HbA1c) reflects:
- Fasting blood glucose levels from the past 24 hours
- Post-meal blood glucose peaks over the past week
- Average blood glucose control over the past 2–3 months (Correct answer)
- The amount of insulin produced by the pancreas daily
Correct answer: Average blood glucose control over the past 2–3 months
HbA1c measures the percentage of hemoglobin with glucose attached, reflecting average blood glucose levels over approximately 2–3 months — the lifespan of red blood cells.
Question 4: How does chronic elevation of cortisol affect blood glucose levels?
- It lowers blood glucose by enhancing peripheral insulin sensitivity
- It raises blood glucose by stimulating gluconeogenesis and promoting insulin resistance (Correct answer)
- It has no direct effect on blood glucose regulation
- It decreases hepatic glucose production
Correct answer: It raises blood glucose by stimulating gluconeogenesis and promoting insulin resistance
Cortisol promotes gluconeogenesis (new glucose production) in the liver and induces peripheral insulin resistance, both of which raise blood glucose levels as part of the stress response.
Question 5: Which critical role does the liver play in blood sugar regulation?
- Producing insulin in response to high blood glucose
- Storing glucose as glycogen and releasing it during fasting or exercise (Correct answer)
- Converting all dietary fat into glucose for energy
- Filtering excess glucose directly from the bloodstream
Correct answer: Storing glucose as glycogen and releasing it during fasting or exercise
The liver stores glucose as glycogen after meals and releases it through glycogenolysis and gluconeogenesis during fasting or exercise to maintain stable blood glucose levels between meals.
Question 6: Metabolic syndrome is best described as:
- A single-gene disorder causing insulin deficiency
- A cluster of conditions including abdominal obesity, high triglycerides, low HDL, hypertension, and elevated fasting glucose (Correct answer)
- An autoimmune condition targeting pancreatic beta cells
- A condition caused solely by excessive dietary carbohydrate intake
Correct answer: A cluster of conditions including abdominal obesity, high triglycerides, low HDL, hypertension, and elevated fasting glucose
Metabolic syndrome is diagnosed when a person has at least 3 of 5 risk factors: abdominal obesity, elevated triglycerides, low HDL cholesterol, hypertension, and elevated fasting blood glucose — all associated with increased cardiovascular and diabetes risk.
Question 7: Which meal composition strategy is most effective at reducing postprandial blood glucose spikes?
- Consuming refined carbohydrates alone for rapid absorption
- Pairing carbohydrates with protein and fat at each meal (Correct answer)
- Eating carbohydrates on a completely empty stomach
- Consuming high-fructose foods before the main course
Correct answer: Pairing carbohydrates with protein and fat at each meal
Combining carbohydrates with protein and fat slows gastric emptying and glucose absorption, resulting in a more gradual and lower blood glucose response compared to eating carbohydrates alone.
NTP Blood Sugar Regulation & Metabolic Balance 2
Reactive hypoglycemia is characterized by: