Across
- 4. the fundamental units of the brain and nervous system
- 7. he capability of multicellular organisms to resist harmful microorganisms
- 9. pieces of very large cells in the bone marrow called megakaryocytes
- 11. a signal transmitted along a nerve fiber.
- 12. a toxin or other foreign substance which induces an immune response in the body
- 13. A shot that helps us build immunity to viruses
- 18. Potential when there is no activity
Down
- 1. a bacterium, virus, or other microorganism that can cause disease.
- 2. a space that separates two neurons
- 3. a colorless cell that circulates in the blood and body fluids and is involved in counteracting foreign substances and disease
- 5. the site of transmission of electric nerve impulses between two nerve cells
- 6. an insulating layer, or sheath that forms around nerves
- 8. a large phagocytic cell found in stationary form in the tissues or as a mobile white blood cell
- 10. appendages that are designed to receive communications from other cells
- 14. a blood protein produced in response to and counteracting a specific antigen.
- 15. one of the four major lobes of the cerebral cortex
- 16. released by the axon terminal
- 17. Potential when there is activity