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transmitting an impulse - action potential and hyperpolarisation

Alice Storr 9 preguntas

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Preguntas del test (9)

  1. 1First, sodium gated channels open
    1. AVerdadero
    2. BFalso
  2. 2[blank_start]Sodium[blank_end] ions flow [blank_start]down[blank_end] the concentration gradient into the axon through the gated channels
    1. ASodium
    2. Bpotassium
    3. Cdown
    4. Dup
  3. 3The build up of positive ions inside the axon [blank_start]open[blank_end] more gated channels
    1. Aopen
  4. 4The potential difference across the membrane is now +[blank_start]40[blank_end]mV
    1. A40
  5. 5The axon is now [blank_start]depolarised[blank_end]
    1. Adepolarised
    2. Bpolarised
    3. Crepolarised
  6. 6During [blank_start]repolarisation[blank_end], the [blank_start]sodium[blank_end] gated channels close and the sodium permeability returns to its usual [blank_start]low[blank_end] state
    1. Arepolarisation
    2. Bdepolarisation
    3. Csodium
    4. Dpotassium
    5. Elow
    6. Fhigh
  7. 7[blank_start]potassium[blank_end] gated channels [blank_start]open[blank_end] and potassium ions move out of the axon down the electrochemical gradient and potassium concentration gradient, [blank_start]attracted[blank_end] by the negative charge outside of the axon.
    1. Apotassium
    2. Bsodium
    3. Copen
    4. Dclose
    5. Eattracted
    6. Frepelled
  8. 8This makes the inside of the cell more [blank_start]negative[blank_end] than the outside as a lot of sodium and potassium ions are [blank_start]outside[blank_end] of the cell. The cell is now [blank_start]repolarised[blank_end].
    1. Anegative
    2. Bpositive
    3. Coutside
    4. Dinside
    5. Erepolarised
    6. Fdepolarised
  9. 9The membrane is [blank_start]highly[blank_end] permeable to potassium ions at this stage so too [blank_start]many[blank_end] move out of the cell. This makes the potassium gated channels close and the potassium diffuse back [blank_start]into[blank_end] the axon in order to restore the resting potential. If there has been a build up of sodium inside the cell due to many successive action potentials then the [blank_start]sodium-potassium[blank_end] start working once more.
    1. Ahighly
    2. Bnot highly
    3. Cmany
    4. Dfew
    5. Einto
    6. Fout of
    7. Gsodium-potassium pumps
    8. Hmagical forces

Información

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