Pages in this set

Page 1

Preview of page 1
Nerve Junctions
A nerve junction occurs between two neurones. This is called a synapse and using
specialised processes will allow two or more neurones to communicate and send signals to
one another.
A cholinergic synapse are those that use acetylcholine as their transmitter substance.
A neurotransmitter is a chemical that…

Page 2

Preview of page 2
Transmission across the synapse




Damilola Fasoyiro A2 Biology
Revision

Page 3

Preview of page 3
Damilola Fasoyiro A2 Biology
Revision

Page 4

Preview of page 4
The role of acetylcholinesterase
an enzyme found in the synaptic cleft
hydrolyses ACh to ethanoic acid and choline via a hydrolysis reaction
stops transmission of signals so that the synapse does not continue to produce action
potentials in the postsynaptic neurone
the ethanoic acid and choline are recycled: by re-entering…

Page 5

Preview of page 5
can also lead to death due to asphyxiation
A lethal dose for the average adult human of sarin gas is a mere 0.5mg of the gas




Damilola Fasoyiro A2 Biology
Revision

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all resources »