Autonomic Nervous System 1 (session 8) Flashcards
True or false: ANS controls voluntary functions
FALSE - controls involuntary functions
What are the two divisions of the ANS?
Sympathetic
Parasympathetic
What are the five anatomical divisions of the brain stem and spinal cord?
Medullary Cranial Thoracic Lumber Sacral
What does the vagus nerve supply?
Heart, lungs and upper digestive tract
Where do the parasympathetic nerves originate?
Lateral horn of the medulla
Where do the sympathetic nerves originate?
Lateral horn of the lumbar and thoracic spinal cord
Which has long myelinated preganglionic fibres, parasympathetic or sympathetic nerves?
Parasympathetic
Which has long unmyelinated postganglionic fibres, sympathetic or parasympathetic nerves?
Sympathetic
True or false: the ganglia of the parasympathetic nerves are located within the innervated tissues
TRUE
What are the two principal neurotransmitters in the ANS?
Acetylcholine (ACh)
Noradrenaline (NA)
True or false: all pre-ganglionic neurones are cholinergic
TRUE (use ACh as their neurotransmitter)
Complete the sentence:
Parasympathetic and sympathetic pre-ganglionic release of ACh results in the activation of post-ganglionic __________ ACh receptors
Nicotinic
What are nicotinic ACh receptors?
Ligand-gated ion channels
True or false: parasympathetic post-ganglionic neurones are also cholinergic
TRUE
Complete the sentence:
Parasympathetic post-ganglionic neurones release ACh which acts on ____________ ACh receptors in the _________ tissue
Muscarinic
Effector