1. When the dendrites recieve a signal they go to the axon hilock. If the signal is powerfull it will travel through the axon (that could be very long) to other cells. Some axsons are so large that they travel through all the spine and others are shorter. When the signal reaches the terminal(the final part of the neurone) it goes to other cells and can cause another signal to appear.
2. (I have problems in taking and uploading photos to my blog, I found some in the internet)
- Sensory: They take information of what its happening inside and outside the body and take it to the CNS to be processed.
- Relay: They connect one neurone to another in the CNS. They take information from one neurone and pass it to another neurone.
- Motor: They get information from other neurons and convey them to the muscles,organs and glands.
3. The video I chose is the following: https://www.youtube.com/watch?v=WhowH0kb7n0
4. Impulses are transmitted from one nerve to another by synapse. An electrical impulse travels along an axon, that triggers the nerve-ending of a neuron to release neurotransmitters, these chemicals diffuse across the synapse (the gap) and hold together with receptor molecules on the membrane of the next neuron. The receptor molecules on the second neuron hold together only to the specific chemicals released from the first neuron. The second neuron can now transmit the electrical impulse to another one.