Across
- 2. Point in the action potential when sodium ion channels in the cell membrane open. This makes the membrane more permeable to sodium ions and the inside of the neuron starts to become positive
- 5. The junction where one neuron is connected to another neuron
- 8. Depression is associated with low levels of this neurotransmitter
- 9. The change in electrical potential associated with the passage of an impulse along the membrane of a nerve cell
- 10. The point in an action potential where the sodium channels close and the cell starts to become more negative again
- 14. Type of cell that lines the interior of blood vessels
- 15. A chemical which diffuses across the synaptic cleft from one neuron to another to trigger a new action potential
Down
- 1. The point in an action potential where the inside of the cell becomes more negative than the resting potential due to potassium ion channels closing slowly
- 3. Gaps in the myelin sheath, the points along the axon the nerve impulse travels down. (3 words, 4, 2 & 7 letters, starts with
- 4. Type of one cells thick epithelial cells
- 5. A cell that produces myelin sheath around neurons
- 6. Drugs that occupy receptors and activate receptors
- 7. A fatty white substance that surrounds the axon of some nerve cells, forming an electrically insulating layer. It allows nerve impulses to travel faster down the axon
- 11. Drugs that occupy receptors and block / do not activate them them
- 12. Lack of this neurotransmitter cause parkinsons disease
- 13. Branched extensions of a nerve cell body that attach to the axon terminals of another neuron