What are two elements needed for neural communication to happen

Which plains area lies in both the united states and canada? altiplano central canadian shield coastal plains great plains

The diagram illustrates the activity of vesicles during a cellular process.

Last week i was assigned a thematic. we have groups of three but the people i was assigned with haven't been in school for days. i would appreciate if anyone can me with my thematic . i highlighted most of the important steps and i circled my thematic topic. in desperate need : ( its due on february 19