Day 9 Vocabulary Assignment

4. a signal transmitted along a nerve fiber
6. a bacterium, virus, or other microorganism that can cause disease
10. the ability of an organism to resist a particular infection or toxin by the action of specific antibodies or sensitized white blood cells
13. the molecules used by the nervous system to transmit messages between neurons, or from neurons to muscles
14. appendages that are designed to receive communications from other cells
17. a space that separates two neurons
18. occurs when the membrane potential of a specific cell location rapidly rises and falls

1. pieces of very large cells in the bone marrow called megakaryocytes
2. one of the four major lobes of the cerebral cortex
3. a colorless cell that circulates in the blood and body fluids and is involved in counteracting foreign substances and disease; a white (blood) cell
5. treatment with a vaccine to produce immunity against a disease; inoculation
7. the fundamental units of the brain and nervous system
8. sheath that forms around nerves, including those in the brain and spinal cord
9. the site of transmission of electric nerve impulses between two nerve cells (neurons) or between a neuron and a gland or muscle cell (effector)
11. a large phagocytic cell found in stationary form in the tissues or as a mobile white blood cell, especially at sites of infection
12. a toxin or other foreign substance which induces an immune response in the body, especially the production of antibodies
15. a blood protein produced in response to and counteracting a specific antigen
16. the imbalance of electrical charge that exists between the interior of electrically excitable neurons (nerve cells) and their surroundings