15 - The Autonomic Flashcards
innervation of autonomic and somatic afferents?
AUTO
- smooth and cardiac muscle
SOM
- skeletal
divisions of autonomic?
- sympathetic and parasympathetic
number of efferents of autonomic and somatic?
somatic
- one motor efferent all the way to effector
auto - motor efferent synapses - pre and post ganglionic neurones - at ganglia the pre-g can form multiple synapses to many post-g
neurotransmission of autonomic efferents and somatic efferent?
somatic
- ACh
auto
- sympathetic
ACh–>NA
- parasympathetic
ACH–>ACh
why is adrenal medulla called a neuroendocrine organ?
supply by sympathetic
- release ACh
- adrenal med release Adrenaline and NA
what are functions of symp/para?
sympathetic
[ALERT AND ACTIVE]
homeostasis/reproduction
parasymp
[REST AND DIGEST]
bowl emptying/digestion
what is dual innervation and antagonistic allow para and symp to work together?
DI
- effectors supplied by post gang neruones that are para and symp
ANTAG
- para/symp do opposite
heart and intestine example?
heart
increased SNS increases heart rate
increased PNS decreases heart rate
intestine
increase SNS decrease motility
increase PNS increase motility
examples of single innervation?
at sweat glands
only SNS innervates
blood vessels
how does single innervation still cause upping or downing? [blood vessels]
vasomotor tone
increase SNS - more ACh released onto smooth muscle
- contract more
- vasoconstriction
increase SNS - less ACh
- less contraction
- vasodilation
example of salivary glands as dual innervation and NOT antagonistic?
NOT ANTAG - PNS and SNS both cause saliva prod
Dual Inn
increase SNS causes vasoconstriction in vessel
lesss raw material supply to salivary gland
less sticky mucus
increase PNS causes vasodilation in vessel
more raw material
more runny mucus
