Receptors Flashcards
What is the predominate neurotransmitter at the terminal synapse of parasympathetic neurons
Ach
M1
excitatory- neural (CNS stimulation, gastric acid secretion, increased GI motility)
M3
Excitatory-Glandular (secretions, smooth muscle contraction, vasodilation)
M5
Excitatory- Salivary glands, iris substantia nigra
M2
Inhibitory- Cardiac (cardiac and neural inhibition)
M4
Inhibitory- CNS/Smooth muscle
What sympathetic affects of the heart?
B-1
Increased HR
Increased Contractility
Increased automaticity and conduction of AV node
What are the Parasympathetics affects of the heart?
Decreased HR
- Inotropism
Decreased AV node conduction
What are the neurotransmitters at the terminal synapses of sympathetic neurons?
Norepinephrine
What are the Sympathetic affects on the vasculature
a-1: vasoconstriction
b-2: vasodilation
a-2: various (vasoconstriction/vasodilation)
What are parasympathetic affects of the Vasculature
Vasodilation through release of NO
What are sympathetic affects on the lungs?
B-2: bronchodilation, increased resp. secretions
a-2: decrease secretions
What are parasympathetic affects on the lungs?
Bronchoconstriction
Increased resp. secretion
What are the sympathetic affects on the GI tracts?
a-1,b-1, b-2: decrease motility, close sphincters, inhibit secretion
What are the parasympatheitc affects on the GI tract
increase motility
relax sphincters
stimulate secretion
