Flashcards in Autonomic Physiology Deck (13):
What does the ANS control?
The subconscious activities of the body
What are the two subdivisions of the ANS?
What is the outflow from the sympathetic system?
Thoracolumbar with nerves coming from T1-12 and L1-2
Where are the ganglia in the sympathetic system?
Close to the vertebrae in the sympathetic trunk
In the sympathetic system, the preganglionic fibres usually
- enter the trunk
- make the synapse
- have a long postganglionic fibre
What is the outflow from the parasympathetic system?
Crania-Sacral with innervation from III, VII, IX and X from the cranial and sacral nerves
- usually have long preganglionic fibre
- ganglion close to the target
Acetylcholine acts on
Norepinephrine acts on
- alpha receptors
- beta receptors
All preganglionic fibres, whether they're sympathetic or parasympathetic release
ACh onto nicotinic receptors
In sympathetic nerves, postganglionic fibres release
norepinephrine onto alpha or beta receptors
In the adrenal gland
norepinephrine and epinephrine are released directly into the blood