In acetylcholine synthesis,
Select one:
a. the key catalyzing enzyme is acetylcholinesterase.
b. choline comes from the diet and the liver.
c. acetyl coenzyme A limits synthesis as it is not found in allcells.
d. there are many steps, just as with the catecholaminetransmitters.
e. Coenzyme A is an important precursor.
All of the following characterize activity at the nicotinicreceptor EXCEPT
Select one:
a. the channel opens rapidly and depolarization occurs.
b. sodium and/or calcium ions enter the next cell.
c. prolonged stimulation of receptors can lead todesensitization.
d. nicotine receptors in the muscles are more sensitive thanthose in the CNS.
e. presynaptic nicotinic receptors can affect transmitterrelease.
Which of the following produces the most serious example of atoxic effect involving acetylcholine?
Select one:
a. Botulism
b. Prairie rattlesnake venom
c. Hemicholinium-3 (HC-3)
d. Black widow spider venom
e. Pyridostigmine
Parasympatholytic agents
Select one:
a. have medical uses in opthalmology and anesthesia.
b. include atropine, which constricts the pupil.
c. are rarely toxic, which is why they have been used throughouthistory.
d. like scopolamine have been used to restore saliva that hasbeen reduced by medications.
e. All of the above
In acetylcholine synthesis,
Select one:
a. the key catalyzing enzyme is acetylcholinesterase.
b. choline comes from the diet and the liver.
c. acetyl coenzyme A limits synthesis as it is not found in allcells.
d. there are many steps, just as with the catecholaminetransmitters.
e. Coenzyme A is an important precursor.
All of the following characterize activity at the nicotinicreceptor EXCEPT
Select one:
a. the channel opens rapidly and depolarization occurs.
b. sodium and/or calcium ions enter the next cell.
c. prolonged stimulation of receptors can lead todesensitization.
d. nicotine receptors in the muscles are more sensitive thanthose in the CNS.
e. presynaptic nicotinic receptors can affect transmitterrelease.
Which of the following produces the most serious example of atoxic effect involving acetylcholine?
Select one:
a. Botulism
b. Prairie rattlesnake venom
c. Hemicholinium-3 (HC-3)
d. Black widow spider venom
e. Pyridostigmine
Parasympatholytic agents
Select one:
a. have medical uses in opthalmology and anesthesia.
b. include atropine, which constricts the pupil.
c. are rarely toxic, which is why they have been used throughouthistory.
d. like scopolamine have been used to restore saliva that hasbeen reduced by medications.
e. All of the above
