Across
- 2. the immune system's way of protecting the body against an infectious disease.
- 6. A protein made by plasma cells (a type of white blood cell) in response to an antigen
- 7. the imbalance of electrical charge that exists between the interior of electrically excitable neurons (nerve cells) and their surroundings.
- 9. microscopic gaps that separate the terminal buttons of one neuron from receptors
- 12. the body's chemical messengers.
- 14. Any substance that causes the body to make an immune response against that substance.
- 16. A type of white blood cell that surrounds and kills microorganisms, removes dead cells, and stimulates the action of other immune system cells. Enlarge.
- 17. A type of blood cell that is made in the bone marrow and found in the blood and lymph tissue.
- 18. The act of introducing a vaccine into the body to produce protection from a specific disease.
Down
- 1. one of the four major lobes of the cerebral cortex.
- 3. nerve cells
- 4. an insulating layer, or sheath that forms around nerves, including those in the brain and spinal cord.
- 5. a rapid rise and subsequent fall in voltage or membrane potential across a cellular membrane with a characteristic pattern
- 8. an electrical signal that travels along a nerve fiber in response to a stimulus and serves to transmit a record of sensation from a receptor or an instruction to act to an effector
- 10. A tiny, disc-shaped piece of cell that is found in the blood and spleen.
- 11. appendages that are designed to receive communications from other cells.
- 13. an organism causing disease to its host,
- 15. the space between neurons at a nerve synapse across which a nerve impulse is transmitted by a neurotransmitter.