Autonomic Nervous System Flashcards
What are the 3 divisions of the autonomic nervous system?
Sympathetic, parasympathetic and enteric nervous systems
What neurotransmitter do preganglionic neurons of the sympathetic nervous system release? Onto what receptor type generally?
Achetylcholine onto nicotinic receptors
What neurotransmitter do postganglionic neurons of the sympathetic nervous system release? Onto what receptor type generally?
Noradrenaline onto alpha/beta adrenoceptors
What neurotransmitter do preganglionic neurons of the parasympathetic nervous system release? Onto what receptor type generally?
ACh onto nicotinic receptors
What neurotransmitter do postganglionic neurons of the parasympathetic nervous system release? Onto what receptor type generally?
ACh onto muscarininc receptors
What levels of the spinal cord does the intermediolateral cell column run?
T1-L3
Which neurotransmitters and which receptors are generally involved in pre and post ganglionic innervation in the sympathetic nervous system?
ACh onto nicotinic receptors pre-ganglionic.
NA onto alpha and beta adrenoceptors post-ganglionic.
What are the 2 anomalies in postganglionic innervation in the sympathetic nervous system?
Sweat glands and adrenal glands are innervated by ACh instead of NA
What effects does sympathetic stimulation of the heart have?
Increased heart rate and force of contraction
Which neurotransmitter and which receptor are involved in somatic nervous innervation of skeletal muscle?
ACh onto nicotinic ACh receptor
Where does the parasympathetic nervous system innervate the heart?
SA node and AV node
Which neurotransmitters and which receptors are involved in pre and post ganglionic innervation in the parasympathetic nervous system?
ACh onto nicotinic receptors pre-ganglionic.
ACh onto muscarinic receptors post-ganglionic.
What type of noradrinergic receptors are found in the lungs?
Beta 2 (because you have 2 lungs)
What type of noradrinergic receptors are found on the heart?
Beta 1 (because you have 1 heart)
Where are cholinergic receptors on the heart found?
SA node and AV node
