AUTONOMIC NERVOUS SYSTEM

Question 1

What is the autonomic nervous system?

Answer 1

1. Viscero-motor (smooth muscles and glands, cardiac muscles)
2. involuntary and subconcious
3. homeostasis
4. sympathetic or parasympathetic

Question 2

Viscero-sensory

Answer 2

• SUBCONSCIOUS
• for visceral reflex: homeostasis
• visceral afferent reflex nerve fibres travel together with parasympathetic nerve fibres

Question 3

visceral pain

Answer 3

referred pain, not well localised
- reach cosnciousness
- visceral pain afferent fibres travel mainly with sympathetic fibres

Question 4

Which part of the spinal cord controls viscero-motor functions (ANS)?

Answer 4

lateral horn
2 neurons used from lateral horn to go to target tissue
1. preganglionic neuron
2. postganglionic neuron

Question 5

ANS pathway

Answer 5

pre-ganglionic neuron (lateral horn) -> post ganglionic neuron (PNS) -> target tissue

Question 6

Which ganglionic neuron is myelinated?

Answer 6

pre-ganglionic neuron

Question 7

Sympathetic nervous system neurotransmitters

Answer 7

flight or fight
preganglionic neurotransmitter: Ach
post ganglionic neurotransmitter: NA

Question 8

Parasympathetic nervous system neurotransmitters

Answer 8

rest and digest
preganglionic neurotransmitter: Ach
postganglionic neurotransmitter: Ach

Question 9

Where are the ganglions for sympathetic nervous system located?

Answer 9

Question 10

Where are the ganglions for parasympathetic nervous system located?

Answer 10

Question 11

Compare the length of ganglions btwn sympathetic and parasympathetic

Answer 11

sympathetic : short pre, long post
parasympathetic: long pre, short post

Question 12

thoraco lumbar outflow

Answer 12

sympathetic nervous system pathway

Question 13

cranio-sacral outflow

Answer 13

parasympathetic nervous system pathway

Question 14

splanchnic nerves

Answer 14

• preganglionic axons that do not synapse in the sympathetic trunk ganglia
• located in
  1. thoracic: greater , lesser, least splanchnic nerves
  2. lumbar
  3. sacral