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Question #47464
The Question
The physiological response to acute and chronic stress involves a neuro-hormonal latency shift, integrating an instantaneous reflex arc with a sustained endocrine cascade. Which of the following statements regarding this biphasic adrenal response is INCORRECT?
Options
- A.
The immediate 'fight or flight' reaction is mediated by the adrenal medulla, which secretes catecholamines to rapidly increase blood glucose via glycogenolysis under direct sympathetic control.
- B.
During chronic stress, the sustained hyperglycemic state is maintained by cortisol, which stimulates gluconeogenesis and inhibits the cellular uptake and utilisation of amino acids.
- C.
The delayed endocrine response is driven by the Hypothalamic-Pituitary-Adrenal (HPA) axis, culminating in the secretion of glucocorticoids from the zona reticularis of the adrenal cortex.
- D.
Both medullary catecholamines and cortical glucocorticoids contribute to lipolysis and proteolysis, but only glucocorticoids produce significant anti-inflammatory and immunosuppressive effects.
Check Your Answer
Correct Answer
Step-by-Step Solution
Explanation
How the Examiner Thinks
Comparative_Analysis
Sharpen your ability to evaluate multiple scenarios and distinguish between competing potential answers.
Concepts Behind This Question
Adrenal Cortex vs Medulla|Reflex Arc Latency|Insulin vs Glucagon Effects
Why This Question Is Tricky
Common Mistakes
Location Specificity Trap: The question tests the student's ability to integrate high-level physiological concepts (HPA-axis latency, metabolic shifts) with precise micro-anatomical facts.
Students often focus on the complex mechanism of chronic stress and overlook the anatomical mismatch, confusing the zona fasciculata (source of cortisol/sugar regulation) with the zona reticularis (source of androgens/sex corticoids).
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Neural Control and Coordination - Class 11 |
| Concept | Reflex Arc Latency |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |