Nicotine Receptors Are Found in ________ in the Periphery and in ________

Nicotine receptors are found in ________ in the periphery and in ________ in the brain.

A) cardiac fibers; glial cells
B) muscle fibers; axoaxonic synapses
C) the pupils; axoaxonic synapses
D) cardiac fibers; axo-dendritic synapses
E) the lungs; axo-dendritic synapses