ch 12 Flashcards
Subdivsions of the PNS
autonomic nervous system
somatic motor system
Subdivision of the autonomic nervous system
parasympathetic nervous system
sympathetic nervous system
True or Flase
The Somatic motor system controls involuntary movements of mulses
Flase
Somatic motor system control voluntary movement of muscles
Threee principal functions of autonomic nervous system
regulation of the heart
regulation of secretory glands
regulation of smooth muscles
Seven regulatory functions of parasympathetic nervous system
heart rate gastric secretion emptying of bladder emptying of bowel eye focus contraction of pupil bronchial smooth muslce
sympathetic nervous system three main functions
regulating cardiovascular system
regulating temperature of body
implementing acute stress response
What are the three basic patterns of autonomic innervation
- innervation by both and divisions are opposed
- innervation by both divisions and divisions are complementary
- innervation and regulation by only one division
The most important part of the feedback loop of autonomic nervous system
baroreceptor reflex
What is the baroreceptor relfex
the feedback loop of the autonomic nervous system that helps regulate blood pressure
Name the day to day influence exerted by the autonomic nervous system on a particular organ
autonomic tone
Name the neurotransmitters of the PNS
acetylcholine
norepinephrine
epinephrine
these receptors mediate responses at all junctions where acetylcholine (ACh) is the transmitter
Cholinergic receptors
Theses receptors medicate responses at all junctions where norepinephrine or epinephrine is the transmitter
adrenergic receptors
The three major subtypes of cholinergic receptors
nicotinicN
nicotinicM
muscarinic
Four major subtypes of adrenergic receptros
a1
a2
b1
b2
What is the response to activation of nicotinicN
promotes ganglionic transmission at all ganglia and promotes release of epinephrine from adrenal medial
What is the response to activation of nicotinicM
contraction of skeletal muscle
What is the response to activation of muscarinic
The appropriate response from the organ involved
What organs are target by muscarinic receptor
eye heart lung bladder GI track sweat glands sex organs blood vessels
Location of a1 receptors
eye blood vessels male sex organs prostatic capsule bladder
Location of a2 receptors
nerve terminals
location of b1 receptors
heart
kidney
What b1 receptors have great therapeutic significance
Cardiac b1 receptors
What happens with activation of b1 receptors in heart
increase heart rate
increase force of contraction
increase in AV node conjunction velocity
Activation of b1 receptor in kidneys result in what
release of renin resulting in elevation of BP due to constriction
Location of b2 receptors
arterioles heart lung skeletal muscle bronchi uterus liver skeleteal muscle
Dopamine receptor location
kidney
result of activation of dopamine receptor
dilates renal blood vessels
which receptors can epinephrine activate
a1
a2
b1
b2
which receptors can norepinephrine activate
a1
a2
b1
which receptors can dopamine activate
a1
b1
dopamine
