ANS Flashcards
Which neurotransmitter is released at the parasympathetic first synapse?
Acetylcholine
Which type of receptor accepts the neurotransmitter at the parasympathetic first synapse?
Nicotinic ACh
Which neurotransmitter is released at the parasympathetic second synapse?
Acetylcholine
Which type of receptor accepts the neurotransmitter at the parasympathetic second synapse?
Muscarinic ACh
Which neurotransmitter is released at the sympathetic first synapse?
Acetylcholine
Which type of receptor accepts the neurotransmitter at the sympathetic first synapse?
Nicotinic ACh
Which neurotransmitter is released at the sympathetic second synapse?
Noradrenaline
Which type of receptor accepts the neurotransmitter at the sympathetic second synapse?
Alpha & beta adrenoreceptors
Which axon is longest in the parasympathetic nervous system?
Presynaptic (synapses near target organ)
Which axon is longest in the sympathetic nervous system?
Postsynaptic (synapses in sympathetic trunk = runs next to spinal cord)
Name two target organs purely innervated by only Sympathetic or the parasympathetic nervous system
Sweat glands
Blood vessels
(SYMPATHETIC)
Name 3 organs innervated by both the sympathetic and parasympathetic nervous system but the parasympathetic innervation predominates
GIT
Bladder
Salivary glands
What is the effect of the parasympathetics on the heart?
Slows
What is the effect of the sympathetics on the heart?
Fast
Name an organ in which the parasympathetics and sympathetics work together
Salivary glands
What are the 3 different types of G proteins?
q
s
i
What is a varicosity?
Sites where synapses occur along an axon = bulges out