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transmitting an impulse - resting potential

Alice Storr 9 preguntas

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Preguntas del test (9)

  1. 1Concentration gradients across the membranes of the exon are established by [blank_start]sodium-potassium[blank_end] which pump [blank_start]3[blank_end]Na+ out and 2[blank_start]K+[blank_end] in
    1. Asodium-potassium pumps
    2. Bgated channels
    3. C3
    4. D2
    5. EK+
    6. FCl-
  2. 2A negative charge inside the axon is also caused by the following negative molecules:
    1. Aanions - glucose, amino acids, proteins
    2. Bchloride ions
    3. Conions
    4. Dhydrogen atoms
  3. 3This continues until there is [blank_start]no[blank_end] difference in charge across the [blank_start]axon membranes[blank_end]
    1. Ano
    2. Ba large
    3. Ca small
    4. Daxon membranes
    5. Enodes of ranviar
  4. 4[blank_start]Potassium[blank_end] ions diffuse out of the neurone down the [blank_start]pottasium[blank_end] concentration gradient
    1. APotassium
    2. BSodium
    3. Cpotassium
    4. Delectrochemical
    5. Esodium
  5. 5This makes the inside of the axon more [blank_start]negative[blank_end] and the outside more [blank_start]positive[blank_end]
    1. Anegative
    2. Bpositive
    3. Cpositive
    4. Dnegative
  6. 6Some [blank_start]sodium[blank_end] moves into the axon down the [blank_start]sodium[blank_end] concentration gradient but the membrane is not very permeable to [blank_start]sodium[blank_end], unlike [blank_start]potassium[blank_end], so this amount is [blank_start]small[blank_end]
    1. Asodium
    2. Bpotassium
    3. Csodium
    4. Dpotassium
    5. Esodium
    6. Fpotassium
    7. Gpotassium
    8. Hsodium
    9. Ismall
    10. Jlarge
  7. 7The diffusion of [blank_start]sodium[blank_end] makes [blank_start]no[blank_end] difference to the charge across the membrane. The diffusion of [blank_start]potassium[blank_end] out of the axon is the cause of a potential difference of [blank_start]-70[blank_end]mV across the membrane. This charge is [blank_start]stable[blank_end] because the [blank_start]electrochemical[blank_end] gradient goes from the outside to the inside of the axon whereas the [blank_start]potassium[blank_end] gradient goes from the inside of the axon to the outside. Sodium cannot interfere due to the [blank_start]impermeability[blank_end].
    1. Ano
    2. Ball the
    3. Csodium
    4. Dpotassium
    5. Epotassium
    6. Fsodium
    7. G-70
    8. H+40
    9. Istable
    10. Junstable
    11. Kelectrochemical
    12. Lpotassium concentration
    13. Mpotassium concentration
    14. Nelectrochemical
    15. Oimpermeability
    16. Ppermeability
    17. Qdark forces of nature
  8. 8You can now describe the axon as p[blank_start]olarised[blank_end]
    1. Aolarised
  9. 9To summarise: a resting potential has a potential difference across the membrane of [blank_start]-70[blank_end]mV. This is caused by the movement of sodium and potassium. First, sodium is moved [blank_start]out[blank_end] whilst potassium is moved [blank_start]in[blank_end]. Next, [blank_start]potassium[blank_end] moves out too. After that, [blank_start]potassium[blank_end] moves back in. At this stage, the e[blank_start]lectrochemical[blank_end] gradient and potassium concentration gradient balance each other. The axon is [blank_start]polarised[blank_end].
    1. A-70
    2. Bout
    3. Cin
    4. Dpotassium
    5. Epotassium
    6. Flectrochemical
    7. Gpolarised

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Descripción
- Psychology Test sobre transmitting an impulse - resting potential, creado por Alice Storr el 20/04/2017.
Idioma
English
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