Autonomic Nervous System Flashcards
1
Q
Where do sympathetic nerve fibres come from?
A
Sympathetic Chain
T1 –> L2 Spinal Nerves
2
Q
Where do parasympathetic nerve fibres come from?
A
CN 10,9,7,3
S2-4
3
Q
What NT do both PS and S ganglia use at nerve fibres?
A
PS: Ach
S: Noradrenaline
4
Q
How do autonomic neurones differ from somatic neurones?
A
Somatic: Direct myelination to effector from SC
Autonomic: Myelinated Preganglionic neuron, synapse at ganglia then UM Postganglionic to effector
5
Q
What are key parasympathetic functions?
A
1) Decrease HR and force of contraction
2) Vasodilation
3) Bronchoconstriction
4) Increased GI motility, secretions and sphincter relaxation
6
Q
What are examples of sympathetic receptor sub types?
A
Alpha: Alpha 1, 2
Beta: Beta 1,2,3
