MSCI 520 Quiz 2: Autonomic Physiology (Liberty university)

Which of these is not true about the somatic motor nervous system? a. It is a voluntary control system b. Each pathways consists of 2 neurons (preganglionic and postganglionic) c. The cell body of the motor neuron is located in the CNS 4/28/23, 10:39 AM Quiz: Autonomic Physiology: MSCI520: Principles of Physiology I (D01) d. The neurotransmitter acetylcholine (ACh) is released from presynaptic terminals of the motoneurons and activates nicotinic receptors located on the motor end plates of the skeletal muscle Q 2.5 / 2.5 pts uestion 2 Which of these cranial nerve nuclei is a component of the sympathetic nervous system? a. CN III b. CN X c. CN IX d. None of these Q 2.5 / 2.5 pts uestion 3 The neurotransmitter most commonly utilized in preganglionic neuronal communication by the sympathetic nervous system is ______? a. Epinephrine b. Norepinephrine c. Acetylcholine d. Serotonin Qu 2.5 / 2.5 pts estion 4 4/28/23, 10:39 AM Quiz: Autonomic Physiology: MSCI520: Principles of Physiology I (D01) The sympathetic postganglionic neurons release only norepinephrine while the adrenal medulla secretes mainly epinephrine (80%) and a small amount of norepinephrine (20%). The sympathetic postganglionic neurons do not secrete epinephrine because; a. Epinephrine is not as widely used in the nervous system as norepinephrine b. Phenylethanolamine-N-methyltransferase (PNMT) which converts norepinephrine to epinephrine is present in the adrenal medulla, but not in sympathetic postganglionic adrenergic neurons c. Acetylcholine which stimulates the secretion of epinephrine does not act on postganglionic neurons d. Dopamine beta hydroxylase in hyperactive in the adrenal medulla