Biology Nervous System Flashcards
1
Q
A nerve is
A
A bundle of neurones
2
Q
Myelin sheath function
A
Insulates axon with small uninsulated sections called nodes
Means the impulse can jump from one node to the next node so is transferred quicker
3
Q
Pathway through nervous system
A
Stimulus- sensory neuron - relay neurone - motor neurone - effector - response
4
Q
Synapse
A
Neurones do not come into contact with each other
A junction between two dentrites known as a synapse is formed
Electrical signal is converted to chemical and travels through synapse by diffusion
