ch. 17 textbook questions

the neurotransmitter at all synapses and neuroeffector junctions in the parasympathetic division of the ANS is

acetylcholine

all preganglionic autonomic fibers release ______ at their synaptic terminals, and the effects are always ______

acetylcholine; excitatory

the white ramus communicans

carries the preganglionic fibers into a nearby sympathetic chain ganglion

Damage to the ventral roots of the first five thoracic spinal nerves on the right side of the body would interfere with the ability to

dilate the right pupil

splanchnic nerves

include preganglionic fibers that go to collateral ganglia

which of the following ganglia belong to the sympathetic division of the ANS

paravetebral ganglia

the large cells in the suprarenal medulla, which resemble neurons in sympathetic ganglia,

release epinephrine and norepinephrine into blood capillaries

visceral motor neurons in the CNS

send axons to synapse on peripherally located ganglionic neurons

sympathetic preganglionic fibers are characterized as being

short in length and myelinated

what anatomical mechanism is involved in causing a person to blush

sympathetic stimulation relaxes vessel walls, increasing blood flow to the skin

preganglionic fibers of the ANS sympathetic division originate in the

thoracolumbar spinal cord

Cutting the ventral root of the spinal nerve at L2 would interrupt the transmission of what type of information?

voluntary and motor output, ANS motor output

postganglionic fibers of autonomic neurons are usually

unmyelinated