Across
- 2. A process that maintains homeostasis by returning the body to its resting/normal state
- 4. Performs gas exchange; brings in O2 and releases CO2
- 8. A foreign cell that invades the body and causes an immune response
- 10. Maintenance of a stable internal environment
- 13. Organ of the endocrine system that makes and releases hormones
- 15. Hormone released by the pancreas that decreases blood sugar levels
- 16. A condition that results from the virus HIV, which shuts down the body's immune system
- 17. A protein in the cell membrane that receives and responds to chemical messages
- 18. A protein produced by the immune system that “flags” pathogens for destruction
Down
- 1. Regulates and controls the body using special cells called neurons
- 3. Transports nutrients, O2, and waste through a system of vessels; interacts with many other systems
- 5. A protein marker on invading cells (pathogens) that identifies it as foreign
- 6. Cells that have the receptors for a specific hormone. A hormone and target cell fit together the way a key fits into a lock
- 7. Breaks down food into small molecules so that they can be absorbed and moved into the bloodstream
- 9. When the response to a sensory stimulus reduces or stops what triggered it
- 10. Protein messenger with a specific shape that travels through the bloodstream to influence another target cell or organ
- 11. Regulates and controls the body by releasing hormones
- 12. A dead or deactivated form of a pathogen that is injected to allow the immune system to create antibodies in advance
- 14. When the body mistakes a harmless particle for a pathogen and activates an immune response.