Autonomic Nervous System

Question 1

What type of synapses exist between sympathetic/parasympathetic pre and post ganglionic fibres?

Answer 1

Cholinergic - nicotinic synapses

Question 2

Describe post ganglionic cells in the adrenal medulla

Answer 2

Release adrenaline, have no axons, are part of the sympathetic system and contribute to mass activation.

Question 3

What effect does the parasympathetic system have on blood vessels?

Answer 3

None

Question 4

What is the effect of the parasympathetic nervous system on blood vessels?

Answer 4

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