Autonomic Physiology Flashcards
What does the autonomic nervous system control?
The subconscious activities of the body
What is the ANS split into?
Parasympathetic system
Sympathetic system
Which nerves make up the sympathetic system?
T1-12
L1-2
Which system’s nerves usually have a long pre-ganglionic fibre?
Parasympathetic system
Which system is associated with “Fight or flight”?
Sympathetic system
ACh works on what type of receptors?
Cholinergic
Give two examples of cholinergic receptors
Muscarinic
Nicotinic
Noradrenaline works on what type of receptors?
Adrenergic
Give two examples of adrenergic receptors
Alpha
Beta
What do all preganglionic fibres release?
ACh onto nicotinic receptors
What do postganglionic fibres in sympathetic nerves release onto alpha or beta receptors?
Noradrenaline
In parasympathetic nerves, postganglionic fibres release what onto muscarinic receptors?
ACh
What kind of NMJ does the somatic nervous system have?
Specialised
What type of receptors are used in the somatic nervous system?
Ionotropic
Ganglia of what nervous system lie closer to the spinal cord?
Sympathetic nervous system
What is the colour of the ramus that contains the preganglionic fibre?
White
Adrenal glands release their adrenaline into where in the sympathetic system?
Directly into the blood
Ganglia from the parasympathetic nervous system lie closer to where?
The target
What does a B2 receptor do?
Relaxes the muscle
Whats does an a1 receptor do?
Contracts muscle
What is the sympathetic system there for?
Fight and flight
What is the parasympathetic system there for?
Rest and digest
An alpha-1 receptor will make smooth muscle do what?
Contract
The parasympathetic system is what type of outflow?
Cranio-sacral
The sympathetic system is said to have what type of outflow?
Thoracic-lumbar
Which type of fibre is unmyelinated?
Post-ganglionic
The somatic nervous system works on what type of muscle only?
Skeletal muscle
