What do the symbols tell you about the conditions
of the reactions shown to the right? Check all of
the boxes that apply.
1) 3H, (g)+N2(g) C. 2NH, (g)
The products and reactants of both reactions
are gases
Reaction 1 occurs at high pressure.
2) 250, (g) + O2(g) 205 250, (g)
Reaction 2 makes a small amount of an
additional product.
A catalyst is used for reaction 2

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The  grandmother cell  is a hypothetical  neuronthat represents a complex but specific concept or object.[1]  it activates when a person "sees, hears, or otherwise sensibly discriminates"[2]  a specific entity, such as his or her grandmother. the term was in use at least as early as 1966 amongst staff and students in the department of experimental psychology, university of cambridge, england. a similar concept, that of the  gnostic neuron, was proposed two years later