notes nervous system: autonomic nervous system Flashcards
what autonomic nervous system division deals with fight or flight?
sympathetic nervous system
an increase in heart rate and blood pressure would be which nervous system?
sympathetic
shifts blood flow to skeletal and cardiac muscle
sympathetic nervous system
this can occur in response to something (being startled) or in anticipation of something (prepping for exercise)
sympathetic nervous system
what autonomic nervous system division deals with rest and digest?
parasympathetic nervous system
stimulates digestion
parasympathetic nervous system
blood flow directed to your digestive system
parasympathetic nervous system
what autonomic nervous system division generally slows things down?
parasympathetic nervous system
true or false: homeostasis requires a balance of PNS and SNS activity
true
what system is dominant during slow activity?
PNS
what system is dominant during high activity?
SNS
true or false: the branches are never active at the same time
false, they are both active at all times
what is tone?
level of activity
what type of proportional relationship is there between tone in the PNS and SNS?
inversely proportional
what type of pathway is the ANS?
efferent
what are the main components of an ANS pathway?
pre-ganglionic neuron
post-ganglionic neuron
effector organ
what are the components of a normal SNS pathway pre-ganglionic neuron?
short, myelinated, releases acetylcholine, binds to nicotinic cholinergic receptor
what are the components of a normal SNS pathway post-ganglionic neuron?
long, unmyelinated, releases norepinephrine, binds to andrenergic receptor
what are the components of a sweating SNS pathway’s pre-ganglionic neuron?
short, myelinated, releases acetylcholine, binds to a nicotinic cholinergic receptor
what are the components of a sweating SNS post-ganglionic neuron?
long, unmyelinated, releases acetylcholine, binds to a muscarinic cholinergic receptor
what are the components of a adrenal gland SNS pre-ganglionic neuron?
short, myelinated, releases acetylcholien, binds to a nicotinic cholinergic receptor
what does the adrenal gland release in the SNS pathway?
epinephrine into the bloodstream
true or false: there is a post-ganglionic neuron present in an adrenal gland SNS pathway
false
