Wk9 FAQs

Question 1

In general terms, how are relative lengths of pre-ganglionic and post ganglionic neurones of the sympathetic nervous system compare to those of the parasympathetic nervous system?

Answer 1

Pre-ganglionic : sympathetic are shorter

Post-ganglionic : parasympathetic are shorter

Question 2

how is Sympathetic outflow from the spinal cord to effector organs is organised

Answer 2

1. Synapse some ganglion
2. Travels up or down sympathetic trunk
3. Pass through sympathetic trunk and have ganglia elsewhere

Question 3

What are the pre-vertebral ganglia of the sympathetic system?

Answer 3

Coeliac
Superior meseteric
Inferior mesenteric

Question 4

Pre-ganglionic neurone

Answer 4

CNS

Nuclei

Question 5

Post-ganglionic neurone

Answer 5

PNS

Ganglia

Question 6

Thoracic lumbar outflow

Answer 6

T1-L2

Sympathetic

Question 7

Cranial sacral outflow

Answer 7

Parasympathetic

Question 8

Ventral root

Answer 8

—> white ramus communicans

• > grey ramus communicans
• > up or down the sympathetic trunk
• > pass through trunk and synapse elsewhere

Question 9

Parasympathetic

Answer 9

3, 4, 9, 10
CNS form ganglion near effectors
Sacral —> pelvic splanchic nerves —> bladder, uterus, penis

Question 10

What does splanchnic mean?

Answer 10

Visceral

Question 11

what is the sympathetic trunk?

Answer 11

• begins in neck
• 2 trunks that fuse at sacral level and common ganglia - ganglionic impa
• 3 cervical, 12 thoracic, 5 lumbar, 1 sacral, 1 common
• 3rd cervical + 1st thoracic ganglia fused = stellate ganglion - between C7 and 1st rib

Question 12

Vasomotor

Answer 12

Blood vessels

Question 13

Pseudomotor

Answer 13

Sweat glands