Answer: They relieve pain mainly by reducing the production of prostaglandins rather than acting on opioid receptors in the brain.
- A They relieve pain mainly by reducing the production of prostaglandins rather than acting on opioid receptors in the brain
- B They mainly reduce fever and have a weak effect on pain perception itself as generally observed in typical laboratory settings
- C They are derived from plant sources rather than being prepared through synthetic routes in a laboratory under usual circumstances
- D They bind to the same opioid receptors as morphine, though with a somewhat stronger affinity according to most studies
Correct answer: A. They relieve pain mainly by reducing the production of prostaglandins rather than acting on opioid receptors in the brain
Explanation: Non-narcotic analgesics such as aspirin work mainly by inhibiting prostaglandin synthesis, while narcotic analgesics act on opioid receptors in the central nervous system, which is linked to tolerance and dependence.
The hydrophobic hydrocarbon tail of each soap/detergent molecule dissolves into an oily dirt droplet, while the hydrophilic (ionic) head stays in the surrounding water - trapping the grease inside a micelle that rinses away with water.
Concept context
Drugs and how they interact with biological targets, chemicals in food, and cleansing agents (soaps and detergents) - chemistry applied directly to daily life and healthcare.