Test
Regulating CA Secretion
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Preguntas del test (18)
1What stimulates the secretion of the CA's?
- AAn action potential
- BAn increase in Noradrenaline
- CNerve damage
2Once the membrane has been depolarised, what voltage gated channels open?
- ASodium
- BCalcium
- CPotassium
3The influx of ions into the cell signals secretion by exocytosis
- AVerdadero
- BFalso
4What is stored in Catecholamine vesicles, along with the CA?
- AATP
- BADP
- CFromogranin
- DChromogranin
5ATP is -ve at body pH, whilst CA's are +ve
- AVerdadero
- BFalso
6Why are CA's stored with these other substances?
- AThey keep the CA's out of solution
- BThey keep the CA's in solution
- CWhich helps prevent vesicle lysis due to osmotic pressure
7ATP can also act as a neurotransmitter
- AVerdadero
- BFalso
8When concentrations of CA in the synapse are low, Alpha2 Adrenergic receptors are activated,
- AVerdadero
- BFalso
9B2 receptors _ adenylate cyclase, which _ the production of cAMP, which _ the influx of ions
- AStimulates, increases, increases
- BStimulates, increases, decreases
- CInhibits, increases, increases
- DInhibits, decreases, decreases
10A2 adrenergic receptors have the opposite effect of B2 adrenergic receptors
- AVerdadero
- BFalso
11Re-uptake Method 1 is presynaptic, and mediated by what?
- AActive transport
- BDiffusion
- CA Na+/K+ pump
- DNa+ channel
12Uptake Method 2 is extraneuronal and is used to...
- ADestroy excess adrenaline
- BSecrete adrenaline into the bloodstream
- CStimulate separate neurones
13Monoamine oxidase is found in the RER and interacts with cytoplasmic neurotransmitter
- AVerdadero
- BFalso
14What is the role of monoamine oxidase (3 steps)?
- AConverts the amine --> aldehyde
- BReduction of Aldehyde --> Acid
- CReduction of Aldehyde --> Alcohol
15Which enzyme uses S-Adenosty Methionine to methylate Neurotransmitters?
- AMonoamine Oxidase
- BCatcheol-O-Methyl Transferase
- CCatecholamine Methylase
16What is the final produce of the Oxidative pathway of Monoamine Oxidase?
- AVMA
- BMOPEG
17What is the final produce of the Reductive pathway of Monoamine Oxidase?
- AVMA
- BMOPEG
18In peripheral tissue, the oxidative pathway predominates. In the brain, the reduction pathway predominates.
- AVerdadero
- BFalso
Información
- Descripción
- Year 2 Test sobre Regulating CA Secretion, creado por gina_evans0312 el 09/02/2014.
- Autor
- gina_evans0312
- Idioma
- English
- Visitas
- 378
- Etiquetas
- Valoración
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