CNS General and Histamine Flashcards
Major inhibitory neurotransmitter
GABA (Gamma-aminobutyric acid)
Major excitatory neurotransmitter
Glutamate
Serotonin is also known as?
5-HT (5-hydroxytryptamine)
Serotonin main function
Mood control
GABA that is ionotropic
GABA A
GABA that is metabotropic
GABA B
GABA A is coupled with what ion channel?
Cl
GABA A induces what action potential?
Repolarization/Hyperpolarization
Dopamine is also known as
Prolactin inhibitor
Pathways of Dopamine
Mesolimbic
Mesocortical
Tuberoinfundibular
Nigrostriatal
Dopamine in the nigrostriatal pathway controls what?
Motor control
Dopamine through mesolimbic and mesocortical pathways control what?
Thought processes/behavior
Dopamine through the tuberoinfundibular controls what?
Prolactin inhibition
Norepinephrine functions
Central blood pressure regulation
Arousal and mood
Acetylcholine CNS functions
Motor control
Memory
Histamine activities
Wakefulness (CNS)
Vasodilation (blood vessels)
Bronchoconstriction (bronchioles)
Parietal cell activation
HCl in stomach is released by?
Parietal cells
What are the 3 activators of parietal cells?
HKAtpase (proton pump)
M3 receptor (cholinergic activation)
Histamine 2
Parietal cells release?
HCl in stomach
Histamine that activates parietal cells
Histamine 2
Histamine 1 functions
Allergy responses
Histamine is mediated by what immunoglobulin?
IgE
Histamine are released by?
Mast cells
Amino acid precursor of Norepinephrine and Epinephrine
Tyrosine
Amino acid precursor of Serotonin
Tryptophan
Monoamine neurotansmitters
Dopamine
Norepinephrine
Serotonin
Difference between H1 and H2
H1 - allergy responses
H2 - HCl production
What generation of H1 blockers can cross the BBB?
1st generation
Diphenhydramine
H1 blocker, 1st gen
Chlorphenamine
H1 blocker, 1st gen
Bromphenamine
H1 blocker, 1st gen
Hydroxyzine
H1 blocker, 1st gen
Meclizine, cyclizine
H1 blocker, 1st gen
Brand name of Hydroxyzine
Iterax
Iterax
Hydroxyzine
2nd gen H1 blockers
Loratadine
Desloratadine
Cetirizine
Fexofenadine
Claritin
Loratadine
Clarinex
Desloratadine
Allegra
Fexofenadine
Zyrtec
Cetirizine
H1 blockers uses
Allergy
Insomnia
Anti-emetic and motion sickness
Neurotransmitter that has input in vomiting center
Histamine
Vomiting center in the brain is known as
Chemoreceptor trigger zone
ADR seen most with H1 blockers, 1st gen
Sedation and somnolence
Aspartate
Excitatory neurotransmitter