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Neurobiologie

Martha Domhoefer 18 preguntas

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Preguntas del test (18)

  1. 1By which mechanism(s) is the unidirectional conduction of nerve fibers guaranteed?
    1. AWrapping of nerve fibers by an insulating sheath
    2. BInactivation of voltage-gated sodium channels
    3. CTemporal summation
    4. DPresynaptic inhibition
    5. EDelayed activation of potassium channels
  2. 2Which role does cyclic AMP play in heterosynaptic facilitation of the gill withdrawal reflex of Aplysia?
    1. AcAMP is formed from ATP
    2. BcAMP activates a G-protein
    3. CcAMP is not involved
    4. DcAMP activated proteinkinase A
    5. EcAMP directly phosphorylates a potassium channel
    6. FcAMP activates a calcium current
  3. 3What is the average conduction velocity of nerve fibers?
    1. A5-30 meters/second
    2. B5-30 millimeters/second
    3. C5-30 meters/hour
  4. 4 Which of the neurotransmitter receptors exclusively evoke excitatory PSP´s?
    1. AGlutamate receptors
    2. BNMDA-receptors
    3. Cnicotinic acetylcholine receptors
    4. DGlycin receptors
    5. EGABAA-receptors
    6. FGABAB-receptors
  5. 5By which molecular mechanism(s) is an IPSP formed in the case of the GABAA-receptor?
    1. AActivation of adenylatcyclase
    2. BOpening of potassium channel
    3. COpening of chloride channel
    4. DPostsynaptic calcium current
    5. EG-protein coupled signaling cascade
  6. 6By which molecular mechanism(s) is an IPSP formed in the case of the mAChR of the heart?
    1. AActivation of adenylatcyclase
    2. BOpening of potassium channel
    3. COpening of chloride channel
    4. DPostsynaptic calcium current
    5. EG-protein coupled signaling cascade
  7. 7Effect of following presynaptic changes on the epsp of corresponding postsynapse: Blocking voltage-gated calcium channels
    1. Aincreased
    2. Breduced
    3. Cno change
  8. 8Effect of following presynaptic changes on the epsp of corresponding postsynapse: Reduction of voltage-gated potassium current:
    1. Aincreased
    2. Breduced
    3. Cno change
  9. 9Calcium binds to the vesicular protein syntaxin leading to the release of synaptic vesicles from microtubules
    1. AVerdadero
    2. BFalso
  10. 10Exocytosis of synaptic vesicles is initiated by the opening of voltage- gated calcium channels
    1. AVerdadero
    2. BFalso

Información

Descripción
Test sobre Neurobiologie, creado por Martha Domhoefer el 05/01/2016.
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Deutsch
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