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Question #46552
The Question
The alkaloid extracted from Erythroxylum coca is a potent central nervous system stimulant. Considering its evolutionary ecology and physiological mechanism of action, which of the following statements is INCORRECT?
Options
- A.
In its natural ecosystem, this alkaloid serves as a metabolically costly secondary metabolite evolved primarily to deter phytophagous predators.
- B.
It induces euphoria and increased energy by competitively binding to post-synaptic dopamine receptors, mimicking the neurotransmitter.
- C.
Its physiological action involves interfering with the transport mechanism of a catecholamine, leading to its accumulation in the synaptic cleft.
- D.
High doses of this plant-derived chemical defense can overstimulate the human CNS, resulting in profound hallucinations.
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
Coca Alkaloids|Evolutionary Ecology of Parasitism|Dopamine
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Students frequently confuse 'Receptor Agonists' (which mimic neurotransmitters at the post-synaptic membrane, like morphine) with 'Reuptake Inhibitors' (which block pre-synaptic transporters, like cocaine).
The trap relies on functional overlap, testing if the student knows the exact micro-anatomical location and mechanism of the drug's action rather than just its macroscopic effect (euphoria).
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Human Health and Disease - Class 12 |
| Concept | Opioids/Cannabinoids/Coca Alkaloids |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |