The receptor potential is generated at the the receptor potential is generated at the receiving region secretory region output region conducting region

Receptor potential  is   generally  at   the  receiving  region. The  receptor potential(also  called  generator   potential) can  work  to  trigger  an  action  potential  either  within  the  same  neuron  or  adjacent  cell.Within  the  same neuron  the  receptor  potential  causes  local  current  flow  to  the  region  responsible   for  action  potential.

The answer is atmosphere. there are four spheres of the earth: 1. geosphere (from greek word 'geo' = ground), 2. hydrosphere (from greek word 'hydro' = water), 3. biosphere (from greek word 'bio' = life), and 4. atmosphere (from greek word 'atmo' = air). a magnetosphere is a region of space around astronomical objects controlled by the magnetic field of that object. through the process of elimination, since lightning is present in the air, it can be found in the atmosphere.