This question-specific review guide is tied to the answer reasoning for a PracticeTestVault item. Use it after you answer the question so the review stays focused on what the prompt actually tested.
What this question is testing
Objective: Macronutrient metabolism
Prompt focus: Which hormone is primarily responsible for stimulating hepatic gluconeogenesis during prolonged fasting?
Why the correct answer works
Glucagon
Glucagon is the catabolic counter-regulatory hormone that signals the liver to produce glucose when intake is low.
Why the tempting wrong answer fails
Calcitonin regulates calcium homeostasis and has no major role in glucose metabolism.
Plain-language takeaway
During fasting, falling blood glucose triggers the alpha cells of the pancreas to release glucagon, which acts on the liver to break down glycogen and synthesize new glucose from amino acids, lactate, and glycerol.
Simple analogy
Think of macronutrient metabolism like following a short checklist: identify the clue, confirm the rule, and then make the move that fits this exact scenario.
How to review it before a retake
- Underline the command word and name what the question is asking before rereading the choices.
- Compare the correct answer against the closest distractor and write the exact detail that separates them.
- Retest this objective with a fresh question without looking at the rationale first.