Across
- 3. a virus that attacks the immune system, specifically the white blood cells.
- 5. an organism that is infected with or fed upon by a parasitic or pathogenic organism.
- 9. microscopic, unicellular organism without a nucleus or other membrane-bound organelles.
- 11. a contagious respiratory illness caused influenza viruses that infect the nose, throat, and sometimes the lungs.
- 12. the semipermeable membrane that surrounds the cytoplasm.
- 15. specialized structure that carries out a specific cell function in different parts of the cell at the same time.
- 16. RNA virus, such as HIV, with reverse transcriptase in its core.
- 20. Plasma membrane layers composed of phospholipid molecules arranged with polar heads facing the outside and nonpolar tails facing the inside.
Down
- 1. flexible, selectively permeable boundary that helps control what enters and leaves the cell.
- 2. a preparation that is used to stimulate the body’s immune response against a specific disease.
- 4. a cell that is part of the immune system and helps the body fight infections and other diseases; develop from stem cells in the bone marrow and become different types of white blood cells.
- 6. an organism that causes disease in a host.
- 7. regulation of an organism’s internal environment to maintain conditions needed for life.
- 8. unicellular organism with membrane-bound nucleus and organelles; generally larger and more complex than a prokaryote.
- 10. a virus that infects a bacteria and reproduces inside of it.
- 13. substance that is able to kill or inhibit the growth of bacteria.
- 14. body system that consists or organs and substances and includes the skin, mucus, and white blood cells.
- 17. a highly contagious upper respiratory disease caused by the SARS-CoV-2 virus.
- 18. the central membrane-bound organelle that manages cellular functions and contains DNA.
- 19. a highly contagious disease caused by the varicella-zoster virus; symptoms include an itchy rash and small, fluid-filled blisters that scab over.