Across
- 4. he electric signal produced by a neuron when stimulated
- 6. a bacterium, virus, or other microorganism that can cause disease.
- 10. the immune system's way of protecting the body against an infectious disease.
- 13. chemical messengers that your body can't function without
- 14. the finger-like cells present on the end of a neuron
- 17. space between two neurons across which the impulse is transmitted by a neurotransmitter
- 18. a rapid sequence of changes in the voltage across a membrane
Down
- 1. a small colorless disk-shaped cell fragment without a nucleus, found in large numbers in blood and involved in clotting.
- 2. it behind the ears and are the second largest lobe
- 3. a colorless cell that circulates in the blood and body fluids and is involved in counteracting foreign substances and disease
- 5. The act of introducing a vaccine into the body to produce protection from a specific disease
- 7. responsible for sending and receiving neurotransmitters
- 8. insulating layer, or sheath that forms around nerves, including those in the brain and spinal cord
- 9. places where neurons connect and communicate with each other
- 11. white blood cell that surrounds and kills microorganisms, removes dead cells, and stimulates the action of other immune system cells.
- 12. any substance that causes the body to make an immune response against that substance.
- 15. A protein made by plasma cells in response to an antigen
- 16. electrical potential difference across the plasma membrane when the cell is in a non-excited state