Autonomic Nervous System Flashcards
1
Q
What type of synapses exist between sympathetic/parasympathetic pre and post ganglionic fibres?
A
Cholinergic - nicotinic synapses
2
Q
Describe post ganglionic cells in the adrenal medulla
A
Release adrenaline, have no axons, are part of the sympathetic system and contribute to mass activation.
3
Q
What effect does the parasympathetic system have on blood vessels?
A
None
4
Q
What is the effect of the parasympathetic nervous system on blood vessels?
A
Sympathetic nerves (alone) cause vasoconstriction (alpha 1 receptors) - the sympathetic nervous SYSTEM CAN cause vasodilation (cardiac and skeletal muscle) - as a result of beta 2 receptors
