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Tyrosine hydroxylase catalyzes the rate limiting step in the synthesis of norepinephrine (NE) and epinephrine. The enzyme is inhibited by
metyrosine.Adrenergic
Norepinephrine
vasoconstrictionAdrenergic
If norepinephrine or eplnephrine wers to stimul|te or combine with the alpba receptors in the eye, which response would you expect?
Mydriasis (dilation of the pupil)Adrenergic
Which two groups of antidepressant drugs has the highest incidence of dry mouth (xerostomia)?
1. Tricyclic antidepressants (i.e. Elavil)
2. Selective serotonin reuptake inhibitors (i.e., Prozac and Paxil)
3. Serotonin and norepinephrine reuptake inhibitors (i.e., Effexor and Cymbalta)
4. Monoamine oxidase inhibitors (i.e., Nardil)
(1) and (3)
Antidepressants and Antihistamines
All of the following anti-depressant drugs are serotonin and norepinephrine reuptake inhibitors except one. Which one is the exception?
Sertraline (Zoloft)Antidepressants and Antihistamines
Propranolol (Inderal) can be useful in the treatment of hypertension because it blocks
a. Alpha-1 adrenergic receptors
b. Sodium reabsorption in the kidney
c. The release of renin from juxtaglomerular cells
d. The release of norepinephrine from nerve terminals
e. The reflex tachycardia seen with the use of other
antihypertensives
(c) and (e) only
Cardiovascular
Which of the following drugs competitively blocks the action of norepinephrine at beta-adrenergic receptors?
PropranololAdrenergics
Injection of a pressor dose of norepinephrine may result in a decreased heart rate because of
Activation of baroreceptor reflexesAdrenergics
The only local anesthetic that increases the pressor activity of both epinephrine and norepinephrine is
cocaineразное с фарм
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