In our Biology class we started learning about the Nervous System. And in order to do this, our teacher, Male, asked us to take a look at these two sites:
And do some activities on her blog:
1.a) 1- Lesson introduction; 2 – Your control centre, the key parts; 3 – The receptors; 4 – The neurones, nerve cells; 5 – Different types of neurones; 6 – Progress question; 7 – The central nervous system; 8 – Progress question; 9 – The nervous pathway; 10 – Example of a nervous pathway; 11 – Progress question.
1.b) SENSORY NEURONES: carry signals from receptors to the spinal cord and brain.
RELAY NEURONES: carry messages from one part of the CNS to another.
MOTOR NEURONES: carry signals from the CNS to effectors.
1.d) The following video is an animation that shows how a synapse works:
The following video shows how a synapse works but also explains it:
A synapse is a junction between two nerve cells, consisting of a minute gap across which impulses pass by diffusion of a neurotransmitter.
A nerve impulse arrives along the axon which causes a nerve-ending to release neurotransmitters. These chemicals diffuse across the synapse and into the next neuron.