536731
Descripción
Test por gina_evans0312, actualizado hace más de 1 año
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Creado por gina_evans0312
hace casi 11 años
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Pregunta 1
Pregunta
What stimulates the secretion of the CA's?
Respuesta
-
An action potential
-
An increase in Noradrenaline
-
Nerve damage
Pregunta 2
Pregunta
Once the membrane has been depolarised, what voltage gated channels open?
Respuesta
-
Sodium
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Calcium
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Potassium
Pregunta 3
Pregunta
The influx of ions into the cell signals secretion by exocytosis
Respuesta
- True
- False
Pregunta 4
Pregunta
What is stored in Catecholamine vesicles, along with the CA?
Respuesta
-
ATP
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ADP
-
Fromogranin
-
Chromogranin
Pregunta 5
Pregunta
ATP is -ve at body pH, whilst CA's are +ve
Respuesta
- True
- False
Pregunta 6
Pregunta
Why are CA's stored with these other substances?
Respuesta
-
They keep the CA's out of solution
-
They keep the CA's in solution
-
Which helps prevent vesicle lysis due to osmotic pressure
Pregunta 7
Pregunta
ATP can also act as a neurotransmitter
Respuesta
- True
- False
Pregunta 8
Pregunta
When concentrations of CA in the synapse are low, Alpha2 Adrenergic receptors are activated,
Respuesta
- True
- False
Pregunta 9
Pregunta
B2 receptors _ adenylate cyclase, which _ the production of cAMP, which _ the influx of ions
Respuesta
-
Stimulates, increases, increases
-
Stimulates, increases, decreases
-
Inhibits, increases, increases
-
Inhibits, decreases, decreases
Pregunta 10
Pregunta
A2 adrenergic receptors have the opposite effect of B2 adrenergic receptors
Respuesta
- True
- False
Pregunta 11
Pregunta
Re-uptake Method 1 is presynaptic, and mediated by what?
Respuesta
-
Active transport
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Diffusion
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A Na+/K+ pump
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Na+ channel
Pregunta 12
Pregunta
Uptake Method 2 is extraneuronal and is used to...
Respuesta
-
Destroy excess adrenaline
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Secrete adrenaline into the bloodstream
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Stimulate separate neurones
Pregunta 13
Pregunta
Monoamine oxidase is found in the RER and interacts with cytoplasmic neurotransmitter
Respuesta
- True
- False
Pregunta 14
Pregunta
What is the role of monoamine oxidase (3 steps)?
Respuesta
-
Converts the amine --> aldehyde
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Reduction of Aldehyde --> Acid
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Reduction of Aldehyde --> Alcohol
Pregunta 15
Pregunta
Which enzyme uses S-Adenosty Methionine to methylate Neurotransmitters?
Respuesta
-
Monoamine Oxidase
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Catcheol-O-Methyl Transferase
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Catecholamine Methylase
Pregunta 16
Pregunta
What is the final produce of the Oxidative pathway of Monoamine Oxidase?
Respuesta
-
VMA
-
MOPEG
Pregunta 17
Pregunta
What is the final produce of the Reductive pathway of Monoamine Oxidase?
Respuesta
-
VMA
-
MOPEG
Pregunta 18
Pregunta
In peripheral tissue, the oxidative pathway predominates. In the brain, the reduction pathway predominates.
Respuesta
- True
- False
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