fall lecture 20 Flashcards
what does the ANS system include
- the sympathetic division
- the parasympathetic division
what does the ANS system do
- involved in maintaining many homeostatic set points
- ex. BP, body temperature, respiratory airflow
what are the purpose of feedback techniques
- to calm the body down
- ex. purge, don’t move, drop resting heart rate
what are the effectors in the brain
glands, and smooth or cardiac muscles
what are baroreceptors
- they deal with pressure
- send stimulus to brain saying there’s too much or not enough blood flow it then alters the heart
sympathetic division
- fight or flight
- prepares body for physical activity
increases heart rate, BP, airflow, ect..
parasympathetic division
- rest and digest
- calms body functions and helps bodily maintenance
somatic pathway
one axon
autonomic pathway
two axons
what are the 2 types of autonomic pathways
sympathetic and parasympathetic
are parasympathetic and sympathetic pathways opposites
no they are teammates because the work together in order to maintain set points
what takes 2 synapses
a visceral involuntary response
parasympathetic synapses
- ACh and nicotinic
- ACh and muscerinic
sympathetic synapses
- ACh and nicotinic
- ACh or adrendric
muscerenic receptors
- can be alpha or beta
- only bind to NE
alpha is
excitatory
adrenal glands belong to
sympathetic
beta is
inhibitory
what is dual intervention
- when 2 nerves go to one source
- typically one is sympathetic and one is parasympathetic ex. pupils
without dual intervention
- some blood vessels only have one nerve path
- rare
paralyzed people may have
- problems with their parasympathetic nerve responses
ex. digestion ; may have feeding tube
sympathetic anatomy
- short pre and long post
- result : widespread and overlapping branches (ramus and plexus)
parasympathetic anatomy
- long pre and short post
- result : specific and low chance of overlapping
memorize pic
from lecture
