Myelin Sheath

E

Cell body of ANS preganglionic neuron

A

Cell body of ANS postganglionic neuron

C

Nonmyelinated neuron

C

Identify if below is Sympathetic or Parasympathetic

Short preganglionic, long postganglionic fibers.

Sympathetic

Identify if below is Sympathetic or Parasympathetic

Collateral ganglia

Sympathetic

Identify if below is Sympathetic or Parasympathetic

Active after you have eaten a meal

Parasympathetic

Identify if below is Sympathetic or Parasympathetic

Decreases heart rate

Parasympathetic

Identify if below is Sympathetic or Parasympathetic

Causes erection of the penis

Parasympathetic

Identify if below is Sympathetic or Parasympathetic

Stimulates ciliary muscles of the eye

Parasympathetic

Identify if below is Sympathetic or Parasympathetic

Increases blood pressure

Sympathetic

True or False

Since the ANS is a visceral motor system, afferent pathways are of no importance and actually are rarely found.

False

True or False

The rami communicantes are associated only with the sympathetic division of the ANS.

True

The gray rami communicantes consist of myelinated postganglionic fibers.

False

True or False

Splanchnic nerves are mixed motor and sensory nerves.

False

True or False

The autonomic nervous system may cause activation or inhibition, depending on the division that is active and the target that is affected.

True

True or False

The celiac ganglion is primarily associated with the sympathetic division.

True

True or False

The sympathetic chain is composed of collateral ganglia.

True

True or False

Thermoregulatory responses to increased heat are mediated by the sympathetic nervous division.

True

True or False

Most disorders of the autonomic nervous system reflect abnormalities of smooth muscle control.

True

True or False

Alpha-adrenergic effects are usually stimulatory and mediatory.

True

True or False

The adrenal medulla is considered a ʺmisplacedʺ sympathetic ganglion by some.

True

True or False

Acetylcholine is the substance released by the axonal endings of the somatic efferent fibers and by the parasympathetic nerve fiber endings.

True

True or False

Most body organs are innervated by only the sympathetic division of the nervous system.

False

True or False

Through direct neural stimulation, the sympathetic division promotes many metabolic effects via hormone release.

True

True or False

Cranial nerves VII, IX, and X contain postganglionic fibers of the parasympathetic nervous system.

False

True or False

In contrast to the parasympathetic division, the sympathetic division has numerous ganglionic neurons in the gray matter of the spinal cord.

False

True or False

Norepinephrine-releasing fibers are called cholinergic fibers.

False

True or False

The parasympathetic division is a branch of the somatic nervous system.

False

True or False

The craniosacral division is the same as the parasympathetic division.

True

True or False

The chain ganglion, like the dorsal root ganglion, contains soma from sensory neurons.

False

True or False

Most blood vessels are innervated by the sympathetic division alone.

True

True or False

The blood vessels of the skin are one of the few areas of the body where the vessels are innervated by both the sympathetic and parasympathetic divisions.

False

True or False

Events recorded in a lie detector examination are controlled by the sympathetic division.

True

True or False

All splanchnic nerves are sympathetic.

True

True or False

Splanchnic nerves pass through the abdominal aortic plexus.

True

True or False

The structures that specifically exhibit vasomotor tone are mostly under sympathetic control.

True

True or False

Since many of the same cardiac cells are innervated by both parasympathetic and sympathetic fibers, the influence of the two divisions on the heart is synergistic.

False

True or False

β-adrenergic receptors are the only receptors found on the heart.

False

True or False

Autonomic reflex centers occur in the spinal cord, medulla, and midbrain.

True