Answer: stress and anxiety.
- A ongoing bodily pain
- B stress and anxiety
- C a high fever
- D a microbial infection
Correct answer: B. stress and anxiety
Explanation: Tranquilisers act on the central nervous system to relieve stress, anxiety and mild mental disorders.
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.