Riki M
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Bachelors Degree Biology Quiz on Nervous System: Action Potential , created by Riki M on 09/11/2015.

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Riki M
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Nervous System: Action Potential

Question 1 of 10

1

Resting Membrane Potential is the difference across plasma membranes expressed in millivolts

Select one of the following:

  • True
  • False

Explanation

Question 2 of 10

1

Resting Membrane Potential is determined by..

Select one of the following:

  • Permeability to Na+ and K+

  • Permeability to Na+ and Ca+

  • Permeability to K+ and Ca+

Explanation

Question 3 of 10

1

When k+ concentration inside the cell is high, the electrical gradient will force K+ into the cell because the electrical gradient is stronger than the chemical gradient.

Select one of the following:

  • True
  • False

Explanation

Question 4 of 10

1

When Na+ concentration inside the cell is low, the cell will

Select one or more of the following:

  • Move Na+ into the cell because of the chemical gradient

  • Move Na+ out of the cell because of the electrical gradient

  • Move Na+ into the cell because of the electrical gradient

  • Move Na+ out of the cell to reach an equilibrium

Explanation

Question 5 of 10

1

Resting membrane potential is -70mV

Select one of the following:

  • True
  • False

Explanation

Question 6 of 10

1

An Action Potential occurs when a threshold point of -40mV is reached

Select one of the following:

  • True
  • False

Explanation

Question 7 of 10

1

When an action potential begins, occurs, causing voltage gates to open and allow Na+ to flow the cell.

Drag and drop to complete the text.

    depolarisation
    Repolarisation
    Na+
    K+
    into
    out

Explanation

Question 8 of 10

1

During the repolarisation phase of an action potential..

Select one or more of the following:

  • Na+ voltage gates close at -30mV (ICF)

  • Na+ voltage gates open

  • K+ gates opening, allowing K+ to flow out the cell

  • K+ gates close at -90mV (ICF)

  • K+ gates open at -90mV(ICF)

Explanation

Question 9 of 10

1

The electrical signal (action potential) is sent along the axon of a nerve cell

Select one of the following:

  • True
  • False

Explanation

Question 10 of 10

1

What happens to the electrical signal (action potential) when it enters the axon terminal?

Select one or more of the following:

  • It enters the synaptic cleft as neurotransmitters

  • it stays in the axon terminal

  • It changes to a chemical signal

  • Causes an influx of Ca+

  • It continues as an electrical gradient

Explanation

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