Which one of the following neurotransmitters functions to increase cardiac output?: (A) GABA, (B) Serotonin, (C) Norepinephrine, (D) Glutamate
Answer is C. Norepinephrine increases cardiac output Dopamine and GABA are CNS inhibitors. Glutamate is the most common excitatory neurotransmitter of the CNS. Serotonin functions as a pain inhibitor, in mood control and in sleep. Serotonin is a biogenic amine but not a peptide