Ch. 14- Autonomic Nervous System

Question 1

Properties of Autonomic Nervous System

Answer 1

Involuntary
Sensory (afferent) or Motor (efferent)
2 motor pathways
Smooth muscle, cardiac muscle, glands
2 neurons in pathway (ganglia- neuron cell bodies in PNS are site of synapse between pre and post ganglionic nerves)
Can be excitatory or inhibitory

Question 2

Motor pathways of ANS

Answer 2

Parasympathetic (rest and digest) or Sympathetic (fight or flight)

Question 3

Parasympathetic Origins

Answer 3

CN III, VII, IX, X
Sacral spinal nerves S2, S3, S4
(craniosacral)

Question 4

Parasympathetic pathway

Answer 4

Ganglia- located on/near effector organ
1.LONG pre- ganglionic
2. SHORT post-ganglionic

Question 5

Parasympathetic neurotransmitters

Answer 5

ACh only

Question 6

Sympathetic Origins

Answer 6

Lateral horn cells T1-L1/L2
(thoracolumbar)

Question 7

Sympathetic pathway

Answer 7

All ganglia- located within sympathetic chain (trunk)
1.SHORT pre-ganglionic
2. LONG post-ganglionic

Question 8

Sympathetic neurotransmitters

Answer 8

Pre-ganglionic = ACh
Post-ganglionic = Norepinephrine/epinephrine

Question 9

PS vs S effect on heart

Answer 9

PS- slows heart rate; S- increases heart rate

Question 10

PS vs S effect on lungs

Answer 10

PS- constricts brachii; S- dialates brachii

Question 11

PS vs S effect on Digestive system

Answer 11

PS- stimulates digestive system; S- inhibits digestive system

Question 12

PS vs S effect on eye (pupil)

Answer 12

PS- constricts pupil; S- dialates pupil

Question 13

PS vs S effect on blood vessels

Answer 13

PS- dialates blood vessels, lowers BP; S- constricts blood vessels, raises BP