Lecture 23 Flashcards
this senses blood pressure and is located in the major systemic arteries
baroreceptor reflex
cell bodies located in the CNS, axons myelinated, NT is ACh
preganglionic neuron
cell bodies located in the peripheral ganglia, axons not myelinated, NT is ACh in para and Norepi in symp
postganglionic neuron
cel body of each sympathetic pregang. neuron lies in the ______ horn of the spinal cord
interomediolateral
all preganglionic neurons are
cholinergic
these fibers pass through the gray rami, are type C, make up 8% of the fibers in the average nerve
postgang. symp. fibers
what are the functions of cervical/thoracic symp. chain
coronary artery dilation, increase heart rate, bronchodilation
these are composed of pregang. fibers, supply abdominal viscera, synapse in prevertebral ganglia, all are cholinergic
splanchnic nerves
this splanchnic nerve is T5-T9
greater
this splnchnic nerve is T10-T11
lesser
this splanchnic nerve is T12
least
this splanchnic nerve is L1-L2
lumbar
vasoconstriction, iris dilation, intestinal relaxation, bladder sphincter contraction are all associated with which receptor
alpha
cardioacceleration, increased myocardial strength and lipolysis are charach. of what receptor
beta1
vasodilation, intestinal and uterus relaxation, bronchodilation, and glycogenolysis are charach. of what receptors
beta2
thermogenesis is charach. of what receptor
beta3
blocks synthesis and storage of norepinephrine
reserpine
blocks sympathetic beta1 and beta2 receptors
propranolol
blocks mostly sympathetic beta1 receptors
metoprolol
fatigue, hypotension, bradycardia, and others are side effects of what
beta blockers
this is stimulated by the sympathetic system and secretes 80% epi and 20% norepinephrine
adrenal medulla
epi/norepi only lasts seconds when secreted by neuron, when secreted into the blood remains active until destroyed by ___
COMT
about 75% of all parasympathetic fibers are in the
vagus nerve (CN X)
primary motor nerve to muscles of facial expression, innervates muscles in inner ear also carries sensation of taste from anterior 2/3 of tongue
facial nerve (CN VII)
this nerve carries the general sensation of taste from posterior 1/3 of tongue, injury can result in impaired swallowing
glossopharyngeal nerve (CN IX)
this nerve lowers heart rate, controls taste and saliva, promotes kidney function, controls fertility
vagus nerve (CN X)
IBS, anxiety, depression, trouble swallowing, migraines are all related to what
vagus nerve dysfunction
