Week 7

Question 1

Give detail into sympathetic division

Answer 1

Fight or flight
preganglionic shorter then post cell bodies of pre in (lateral horn T1-L2)
Secretion of epinephrine and norepinephrine
Inhibit secretion for digestion
Increase sweat
Increase HR
Vasoconstriction
Airway dialation

Question 2

Talk about parasympathetic

Answer 2

rest and digest
preganglionic longer then post (cervical and sacral) - cell bodies of pre in cranial nerves 3,7,9,10 and S2-S4
secrete digestive enzymes - insulin
Decrease HR
Constrict pupil
Vasodilation
Erection of clitoris and penis

Question 3

What is the sympathetic trunk

Answer 3

• Group of ganglia located lateral to vertebral bodies
• Contains synapse of pre and post ganglionic
• Possesses connections to spinal nerves

Question 4

How does sympathetic trunk connect to spinal nerves

Answer 4

Connect to spinal nerve via the:
Pre-ganglionic neuron: in via white ramus
Post-ganglionic neuron: out via grey ramus

Question 5

Are pre and post ganglionic fibres myelinated or unmyelinated

Answer 5

Pre - myelinated
Post - unmyelinated

Question 6

Talk thru the cholinergic shit of the parasympathetic system

Answer 6

Pre - releases AcH at nicotinic receptors
Post releases AcH at muscarinic receptor such as smooth muscle