The answer is b. fast / ionotropic;
slow / metabotropic. There is fast neurotransmission since the ligand – gated ion
channel receptor is directly activated by the neurotransmitter. On the other hand, G – protein coupled
receptor is bound to the neurotransmitter in order to stimulate a chemical
signaling cascade which has a longer pathway, thus, making it slow and
metabotropic.
