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Neuroscience- UT Houston B1
A review of the drugs and diseases from Block 1
32
Other
Professional
01/22/2007

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Term
Atropine
Definition
Blocks ACh muscarinic receptors.

Clinical:
1)relaxes muscles in the eye causing pupil to dilate. Used when the eye is inflammed during and eye exam.
2) Slows the activity of stomach and intestinal track and reduces acid secretion
3) Has been used some for Parkinson's
Term
Scopolamine
Definition
Blocks ACh CNS muscarinic receptors

Clinical: Used to prevent motion sickness
Term
Amantadine
Definition
Blocks ACh muscarinic receptors
Term
Bethanechol
Definition
Mimics ACh

Clinical: Treats urinary retention and stimulates movement of intestines
Term
Eserine
Definition
Blocks ACh breakdown by inhibiting AChEsterase

Clinical: Used to diagnose and treat myasthesia gravis
Term
Botulinum Toxin
Definition
Inhibits ACh release from presynaptic neuron
Term
Black Widow Spider Toxin
Definition
Stimulates ACh release
Term
Picrotoxin
Definition
Blocks ion flow through the GABA A receptor.

This inhibits Chlorine traveling through the receptor which leads to seizures
Term
Barbiturates
Definition
Bind to the Beta subunit of GABA A and increase the ability of the endogenous transmitter to do its job
Term
Benzodiazepines
Definition
(aka Valium) Binds to the Gamma subunit of GABA A receptor and enhances the ability of the endogenous transmitter to do its job (pump CL GABA pump!)
Term
Strychnine
Definition
Blocks binding of glycine to its receptor (Found as a Rat poison!)
Term
Neostigmne
Definition
Blocks the action of acetylcholine esterase. This increases the duration of the end plate potential
Term
Curarae
Definition
Competitive inhibitor of acetyl choline. It doesn't block K or Na conductance
Term
Oubain
Definition
Inhibits Na/K pump

We can still generate an AP in the presence of Oubain. Over a long period of time sodium accumulates inside the cell which eventually leads to problems
Term
TTX
Definition
Blocks the voltage dependent Na channels
Term
TEA
Definition
Abolishes voltage dependent changes in K permability
Term
Reserpine
Definition
Inhibits the uptake of Monoamine neurotransmitters into storage vesicles
Term
Name the catecholamines
Definition
Dopamine, Norepinephrine, and Epinephrome
Term
Cocaine
Definition
Acts by blocking the transport of Monoamine neurotransmitters back into the presynaptic terminal
Term
What is Dopamines metabolite?
Definition
HVA
Term
Name the metabolite for Norepinephrine
Definition
MHPG
Term
Name the metabolite for Serotonin
Definition
5-HIAA
Term
Neuromodulators
Definition
Neuropeptides that have effects that depress the effects of a second transmitter
Term
Name the disease that is caused by the degeneration (partially) of cholinergic neurons of the CNS.
Definition
Alzheimer's
Term
What disease is caused by uncontrolled recuitment of electrical activity in nerve cells?
Definition
Epilepsy (Picrotoxin can cause seizures by blocking GABA A)
Term
Huntington's Disease
Definition
A neurodegenerative disease associated with abnormal involuntary movements due to the repeated mutation in the huntingtin gene
Term
What diesease is associated with sensory and motor neuron losses due to demyelination?
Definition
Multiple Sclerosis
Term
Schizophrenia
Definition
Delusions and hallucinations believed to be due to imbalances in the dopamine and glutamate nuerotransmitter systems
Term
What disorder is due to degeneration of dopamine neurons in the substantia nigra-basal ganglia pathway?
Definition
Parkinson's
Term
N-CAM
Definition
A Calcium independent homophilic neuronal adhesion molecule. Each N-CAM binds to another N-CAM
Term
What does Agrin induce?
Definition
Clusterine of pre-existing ACh receptors and other components of the neuromuscular junction
Term
Paragyline
Definition
Irreversible inhibitor of MAO, thereby blocking monoamine degradation.

DA---> DHPA (via MAO)
NE-->DHPGA (via MAO)
5-HT---> 5-HIAA (via MAO)

MAO stands for Monoamine oxidase
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