nervous system: PNS motor (efferent) division

Question 1

CNS goes to

Answer 1

effector (E)

Question 2

2 subdivisions

Answer 2

somatic

automatic

Question 3

somatic

Answer 3

effector=skeletal
-consists of lower motor neurons:
=single multipolar neuron
a)cell body in ventral horn of spinal cord to effector
b)cell body in motor nuclei of brain stem to effector
eg. facial motor of nucleus for cranial nerveVII

Question 4

automatic

Answer 4

effector = smooth muscle, cardiac muscle, glands

page 17

Question 5

automatic has 2 successive multipolar neurons from CNS to effector

Answer 5

a) preganglionic neuron

b) postganglionic neuron

Question 6

preganglionic neuron

Answer 6

myelinated

cell body in brain stem or lateral horn of spinal cord

Question 7

postganglionic neuron

Answer 7

unmyelinated

cell body in autonomic ganglion (outside CNS)

Question 8

automatic 2 subdivisions

Answer 8

sympathetic SNS

parasympathetic PSNS

Question 9

cell body of preganglionic neuron for SNS

Answer 9

lateral horn (T1-L2)

Question 10

cell body of preganglionic neuron for PSNS

Answer 10

brainstem

S2-S4

Question 11

autonomic ganglia sns

Answer 11

trunk (either side of vert column) or collateral (ant to vert column or close to large abdominal arteries)

Question 12

autonomic ganglis psns

Answer 12

terminal (at or in organ/effector wall)

Question 13

postganglionic neurons sns

Answer 13

long axons

Question 14

postganglionic neurons psns

Answer 14

short axons

Question 15

functions sns

Answer 15

fight or flight

Question 16

functions psns

Answer 16

rest and digest

Question 17

exit CNS (nerves) sns

Answer 17

mainly as thoracic nerves

Question 18

exit CNS (nerves) psns

Answer 18

mainly (80%) by vagus (cranial nerve x)

Question 19

adrenal medulla

Answer 19

modified postganglionic neurons of SNS