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Question #45446
The Question
In a state of extreme metabolic stress, an organism's endocrine system exhibits a dynamic shift where cortisol and glucagon levels peak, overriding basal insulin effects. This creates a 'glucose sparing' effect analogous to resource-partitioning. Which of the following statements regarding the cellular dynamics of this state is INCORRECT?
Options
- A.
Glucagon and cortisol synergistically reduce cellular glucose uptake and utilization in peripheral tissues.
- B.
The central nervous system experiences severe glucose starvation due to the systemic downregulation of insulin-dependent glucose transporters.
- C.
Hepatic glycogenolysis and gluconeogenesis are accelerated to maintain a hyperglycemic state for obligate glucose consumers.
- D.
Cortisol promotes lipolysis and proteolysis to provide alternative metabolic substrates for peripheral tissues.
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Correct Answer
Step-by-Step Solution
Explanation
How the Examiner Thinks
Evolutionary_Exception
Tackle problems where standard rules evolve or change based on specific environmental constraints.
Concepts Behind This Question
Insulin|Glucagon|Predator-Prey Oscillations
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Students often mistakenly believe that insulin is universally required for glucose uptake in all cells.
They fail to distinguish between insulin-dependent tissues (adipose/muscle) and insulin-independent tissues (CNS).
The trap relies on the assumption that systemic insulin suppression starves the brain, whereas evolutionarily, it is the exact mechanism that saves it.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Chemical Coordination and Integration - Class 11 |
| Concept | Insulin vs Glucagon Effects |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |