Nuerons and synaptic transmission

Question 1

what are the 3 types of neurons?

Answer 1

Sensory Neuron
Relay Neuron
Motor Neurons

Question 2

what are sensory neurons

Answer 2

These carry messages from the PNS to the CNS - long dendrites and short axons

Question 3

What are relay neurons

Answer 3

They connect the sensory neurons to the motor or other relay neurons - short dendrites and short axons

Question 4

What are motor neurons

Answer 4

These connect the CNS to effectors such as muscles and glands - short dendrites and long axons

Question 5

Structure of a Neuron

Answer 5

-Cell body - includes nucleus that contains genetic material
-Dendrites - carry nerve impulses from neighbouring neurons towards the cell body
-Axon carries impulses away from the cell body down the length of the neuron
-the axon is covered in a fatty layer of myelin sheath that protects the axon and speeds up electrical transmission
-nodes of ranvier - also speed up the transmission of the impulse by forcing it to ‘jump’ across the gaps along the axon

Question 6

synaptic transmission