In a phenomenon known as , many incoming signals produce progressively larger graded potentials in a cell−larger than any single impulse would produce alone.

neurotransmitters

Explanation:

Neurotransmitters are endogenous chemicals that enable neurotransmission. It is a type of chemical messenger which transmits signals across a chemical synapse, such as a neuromuscular junction, from one neuron (nerve cell) to another "target" neuron, muscle cell, or gland cell.

r = ρ x length / area  

ρ = r x area / length  

ρ is in ohm-meters  

in basic units, it is m³kg/s³a²  

i think this is it.

total distance/total time

(85 + 82)/(5+3)

167/8

20 just over