Topic 9.6 Effects of drugs on the nervous system Flashcards
1
Q
How does nicotine work?
A
Absorbed in the lungs. Travels to brain via blood stream.
Similar shape to acetylcholine = binds to cholinergernic receptors.
Stimulant effect causes symptoms of sharpness and relaxation.
Releases dopamine, increases HR and BP
2
Q
How does lidocaine work?
A
Absorbed through skin or injected.
Blocks voltage-gated Na+ ion channels = Na+ cannot enter the cell = prevents post synaptic neuron from depolarising.
Prevents transmission of pain signals so acts as anaesthetic.
3
Q
How does cobra venom work?
A
Blocks acetylcholine recpetors on diaphragm = acetylcholine cannot bind = muscle cannot contract during inhalation.
Disrupts normal breathing.
Causes paralysis
