Introduction to the ANS Flashcards
Which branch of the ANS is dominant in the basal control of heart rate?
Parasympathetic
Which branch of the ANS is responsible for stimulation of bladder-emptying?
Parasympathetic
Which NT is released in between the pre- and post-synaptic fibres in the ANS?
ACh
What NT is used in the parasympathetic nervous system?
ACh
Where do all sympathetic nerves originate?
Thoracolumbar
Where is ACh found in the sympathetic nervous system?
- Between pre- and post-synaptic fibres
2. When activating sweat glands
How does the influence of the sympathetic and parasympathetic nervous systems differ?
Parasympathetic = discrete, localised effect; sympathetic = co-ordinated mass-activation of neurones
What is a type 1 receptor?
Linked to an ion-channel, “ionotropic”
Where are nicotinic receptors found?
Within the ganglion
What sort of receptor is a nicotinic receptor?
Ion-channel linked, type 1
Describe the differences in speed between nicotinic and muscarinic receptors
Nicotinic = very fast; muscarinic = much slower
What sort of receptor is a muscarinic receptor?
Type 2 G-protein linked
Name the 2 receptors activated by ACh
Nicotinic; muscarinic
Where are muscarinic receptors found?
End of autonomic ganglia
Which branch of the ANS enables you to see objects close-up?
Parasympathetic