ANS

Question 1

Sympathetic preganglionic cells

Answer 1

thoracolumbar origin, axons leave via ventral roots, Short fibers w/much divergence FOUND EVERYWHERE

Question 2

Parasympathetic preganglionic cells

Answer 2

Craniosacral origin, Long fibers w/ little divergence FOUND ONLY IN VISCERAL CAV, EXTERNAL GENITALIA, EYES, GLANDS

Question 3

Sympathetic NT

Answer 3

ACh > nicotinic reveptors, NE > adrenergic receptors

Question 4

Parasympathetic NT

Answer 4

ACh, ACh> muscarinic receptors

Question 5

Enteric Nervous System

Answer 5

3rd division of ANS. An intrinsic network of the G tract capable of generating rhythmic contraction/relaxation w/o CNS

Question 6

ENS NT

Answer 6

non-peptides: serotonin, ATP, Dopamine, nit ox

Peptides: CCK, Enkaphalins, Gastrin-releasing pep, Neuropep Y, Sub P, somatostatin, VIP

Question 7

Visceral Afferent Neurons

Answer 7

90% are unmyelinated C fibers
Cell bodies in Dorsal root gang, or cranial n gang
Low density of receptors in tissue and low neuronal rep in cerebral cortical perception areas

Question 8

Visceral Afferents in sympathetic nerve trunks

Answer 8

lead to perceived visceral pain

Question 9

Visceral Afferents in parasympathetic nerve trunks

Answer 9

perform unperceived reg function

Question 10

Micturition reflex

Answer 10

Voiding of urinary bladder. ANS determines contraction of bladder. Somatics determine control of sphincters

Question 11

Carotid Sinus Reflex

Answer 11

Controls BP when moving from lying to standing. Integration of baroreceptors in the carotid sinus and both divisions of ANS

Question 12

Viscerosomatic Reflex

Answer 12

Protective reflex generated by visceral afferents in the peritoneum or w/in visceral organs. Integrated w/ somatic motor neurons innervating the abdominal wall. Results in tightening of the muscles to protect the affected visceral organ