(a)[3]
The Indian cobra’s venom contains a toxin that produces muscle paralysis in mammals bitten by the snake. The toxin acts at cholinergic synapses. Suggest ways in which the toxin in cobra venom may cause muscle paralysis.
(b)[3]
Describe the function of calcium ions in synaptic transmission.
(c)[2]
Synapses reduce the speed of nerve impulse transmission, but they are important in the nervous system. Outline two roles of synapses in the nervous system.