Neurons & Synaptic Transmission Flashcards
1
Q
What is a neuron?
A
are nerve cells that process and transmit messages through electrical/chemical signals
2
Q
What is a sensory neuron?
A
Carry messages from the PNS - CS - long dendrites and short axons
3
Q
What is a relay neurone?
A
Connect sensory to motor neurone and have short dendrites and short axons
4
Q
What are motor neurons?
A
Connect the CNS to affect things like muscles/glands - have short dendrites and long axons
5
Q
How many neurons are in the human NS?
A
100 billion
6
Q
What does the cell body contain?
A
A nucleus - contains genetic material of the cell
7
Q
What are dendrites?
A
Protrude from cell body and carry nerve impulses towards the cell body
8
Q
What does the axon do?
A
Carries impulses away from the cell body
