ANS 1 Flashcards
where do pre-ganglionic fibres originate from?
CNS
where do post-ganglionic fibres originate from?
autonomic ganglia
where in the CNS do sympathetic pre-ganglionic fibres originate?
thoracolumbar
where in the CNS do parasympathetic pre-ganglionic fibres originate?
craniosacral
where in the CNS do sympathetic post-ganglionic fibres originate?
- paravertebral chain
- prevertebral ganglia
where in the CNS do parasympathetic post-ganglionic fibres originate?
in or near target organ
what innervation controls pupillary dilator muscle?
sympathetic
what is another term for pupillary dilation?
mydriasis
what innervation controls pupillary constrictor muscle?
parasympathetic
what is another term for pupillary constriction?
miosis
when bladder is filling, what part of ANS controls predominantly?
sympathetic
- relaxation of detrusor muscle
- contraction of internal sphincter muscle
when bladder is full, what part of ANS controls predominantly?
parasympathetic
- contraction of detrusor muscle
- relaxation of internal sphincter muscle
what are the effects of parasympathetic innervation?
“rest and digest”
what are the effects of sympathetic digestion?
“fight or flight”
what do chromaffin cells release?
- adrenaline (80%)
- noradrenaline (20%)
where do pre-ganglionic sympathetic fibres synapse?
on chromaffin cells
what synapses on chromaffin cells?
pre-ganglionic sympathetic fibres
what effect does the parasympathetic nervous system have on the heart?
decreases HR
what effect does the sympathetic nervous system have on the heart?
- increases HR
- increases force of contraction
what effect does the parasympathetic nervous system have on the digestive tract?
increases motility and secretion
what effect does the sympathetic nervous system have on the digestive system?
decreases motility and secretion
what effect does the parasympathetic nervous system have on the lungs?
bronchoconstriction
what effect does the sympathetic nervous system have on the lungs?
bronchodilation
what effect does the parasympathetic nervous system have on the urinary bladder?
release of urine
what effect does the sympathetic nervous system have on the urinary bladder?
urinary retention
what effect does the parasympathetic nervous system have on the eye?
constricts (miosis)
what effect does the sympathetic nervous system have on the eye?
dilates (mydriasis)
what effect does the parasympathetic nervous system have on the male sexual organs?
erection
what effect does the sympathetic nervous system have on the male sexual organs?
ejaculation
what effect does the sympathetic nervous system have on the male sexual organs?
ejaculation
what effect does the parasympathetic nervous system have on the blood vessels?
no effect (mostly)
what effect does the sympathetic nervous system have on the blood vessels?
constriction (mostly)
what effect does the parasympathetic nervous system have on the salivary glands?
increases secretion
what effect does the parasympathetic nervous system have on the sweat glands?
no effect
what effect does the sympathetic nervous system have on the sweat glands?
increases secretion
what effect does the parasympathetic nervous system have on the liver?
no effect
what effect does the sympathetic nervous system have on the liver?
- glycogenolysis
- gluconeogenesis
what effect does the parasympathetic nervous system have on pilomotors?
no effect
what effect does the sympathetic nervous system have on pilomotors?
piloerection
