Which pair of drugs below are antagonists for the acetylcholinrgic muscarinic and nicotinic (respectively) receptors?

Atropine and curare

Atropine acts by preventing acetylcholine from depolarization of the post synaptic membrane and also prevents the generation of impulse in the cell. Curare can produce similar effect but it targets the junction between the nerve cells and muscles. Curare was derived from the plants in central ans south America. This can cause muscle weakness and death by asphyxiation at high doses due to paralysis of the diagphragm.

Are you asking about a street map usage  if so here is your answer  a street map for a very limited area could simply be a bit map or a .jpg image.  but a more general map would probably store the streets as vectors.  but you shouldn't assume that there is one way to do it