Across
- 3. - an electrical signal that travels along the Axon of a neuron when it has received a strong enough signal
- 6. charged – an ion which has a positive charge because it has more protons than electrons
- 7. - the plural for nucleus which is the control centre for a cell. It contains all the genetic material in the cells and controls the action of the cell
- 8. - DNA stands for deoxyribonucleic Acid. It is a very large molecule which holds genetic information in the form of genes which are part of a strand of DNA
- 9. synaptic neuron - the first neuron at the Synaptics connection with another neuron
- 10. - an atom or molecule which has either a negative or a positive charge because it has gained or lost electrons
Down
- 1. difference - where there is a voltage difference between the inside and outside of the cell. In relation to nerve impulses, the potential difference is caused by there being more positively charged particles on one side of the Axon membrane than the other.
- 2. - refers to the neuron after the synapse. That is the second neuron, the one which the first neuron is communicating with by connecting at the synapse
- 4. neuron - a neuron which has a myelin sheath on its Axon. The myelin sheath is made of Schwann cells wrapped many times around the Axon
- 5. - tiny sacs within the cells that are surrounded by membrane to keep their content separate from the rest of the cell.