Answer: central nervous system and gut.
- A liver and pancreatic cells
- B kidney and adrenal glands
- C central nervous system and gut
- D skin and sweat glands
Correct answer: C. central nervous system and gut
Explanation: Opioids like morphine and heroin bind to specific opioid receptors present mainly in the central nervous system and gastrointestinal tract, depressing body functions.
The Plasmodium parasite needs both hosts: the female Anopheles mosquito injects sporozoites while biting (infecting the human liver and RBCs, causing the malaria fever cycle), then picks up gametocytes from an infected person's blood, completing the parasite's sexual stage inside the mosquito.
Concept context
Pathogens, infectious diseases, non-infectious diseases, drugs, cancer, and public health. High NEET importance.