Biology

star goldstar goldstar goldstar goldstar greyFemaleMale
63 Questions - Developed by: V - Developed on: - 162 taken

  • 1
    - Any change of membrane potential represents an action potential
     True
     False
  • 2
    - Any change of membrane potential does not lead to action potential
     True
     False
  • 3
    - Membrane potential rises (shifts to positive values) during the hyperpolarization phase of action potential
     True
     False
  • 4
    - Membrane potential decreases under the level of resting membrane potential during the hyperpolarization phase of action potential
     True
     False
  • 5
    - Membrane potential shifts to 0 mV during the hyperpolarization phase of action
    potential
     True
     False
  • 6
    - Membrane potential exceeds the threshold during the hyperpolarization phase of action potential
     True
     False
  • 7
    - Membrane potential rises (shifts to positive values) during the depolarization phase of
    action potential
     True
     False
  • 8
    - Membrane potential decreases (shifts to negative values) during the depolarization
    phase of action potential
     True
     False
  • 9
    - Action potential of neuron is approx. -70 V
     True
     False
  • 10
    - Action potential of neuron is approx. -70 μV
     True
     False
  • 11
    - Action potential of neuron is approx. -70 mV
     True
     False
  • 12
    - Action potential is kind of general electric event of „irritable“ tissues
     True
     False
  • 13
    - Action potential is kind of general electric event of each living cell
     True
     False
  • 14
    - Action potentials do not occur on non-myelinated nerve fibers
     True
     False
  • 15
    - Action potentials occur on non-myelinated nerve fibers
     True
     False
  • 16
    - The general law (principle) „all or none“ does not apply to conduction along nerve fibers
     True
     False
  • 17
    - The general law (principle) „all or none“ applies to conduction along nerve fibers
     True
     False
  • 18
    - The Na+-K+ ATP-ase renews (and maintains) resting membrane potential
     True
     False
  • 19
    - The Na+-K+ ATP-ase gives rise to action potential
     True
     False
  • 20
    - Resting membrane potential is potential difference measured between the inside and the outside of the cell
     True
     False
  • 21
    - Intracellular spaces of cells are charged negatively compared to extracellular ones
     True
     False
  • 22
    - Intracellular spaces of cells are charged positively compared to extracellular ones
     True
     False
  • 23
    - Resting membrane potential is caused by 10 – 30 fold higher concentration of ions
    inside the cell
     True
     False
  • 24
    - Resting membrane potential is caused by 10 – 30 fold higher concentration of ions
    within the extracellular space
     True
     False
  • 25
    - Resting membrane potential results from higher concentration of divalent cations within the extracellular space
     True
     False
  • 26
    - Resting membrane potential results from higher concentration of divalent cations within the intracellular space
     True
     False
  • 27
    - Action potential usually results from an abrupt and massive influx of Na+ ions into the
    cell (sodium influx)
     True
     False
  • 28
    - Action potential results from efflux of K+ ions from the cell
     True
     False
  • 29
    - Action potentials end with repolarization being caused by active transport of potassium into the cell
     True
     False
  • 30
    - The stronger the stimulus, the higher the number of action potentials
     True
     False
  • 31
    - The stronger the stimulus, the higher the amplitude of action potentials
     True
     False
  • 32
    - The stronger the stimulus, the lower the amplitude of action potentials
     True
     False
  • 33
    - The magnitude of action potentials depends on the stimulus strength
     True
     False
  • 34
    - The magnitude of action potentials does not depend on the stimulus strength
     True
     False
  • 35
    - The magnitude of membrane potential (e.g. generator potential or resting potential) depends on membrane's conductance (permeability of the membrane) and the concentration of ions
     True
     False
  • 36
    - The magnitude of membrane potential (e.g. generator potential or resting potential) depends on membrane's conductance (permeability of the membrane), but not on the concentration of ions
     True
     False
  • 37
    - The magnitude of membrane potential (e.g. generator potential or resting potential)
    depends on the concentration of ions, but not on membrane's conductance (permeability of the membrane)
     True
     False
  • 38
    - During action potential the intracellular space gathers sodium ions (the total number of sodium ions within the cell increases)
     True
     False
  • 39
    - During action potentials the intracellular space gathers potassium ions (the total number of potassium ions within the cell increases)
     True
     False
  • 40
    - Action potential spreads along nerve fibers (muscle cells) with the same shape and
    magnitude
     True
     False
  • 41
    - Action potential spreads along nerve fibers (muscle cells) with the same shape, but not
    the same magnitude
     True
     False
  • 42
    - Action potential spreads along nerve fibers (muscle cells) with the same magnitude, but not the same shape
     True
     False
  • 43
    - Action potential propagates in myelinated fibers by „jumping“ (a saltatory transmission)
     True
     False
  • 44
    - Action potential propagates in non-myelinated fibers by „jumping“ (a saltatory transmission)
     True
     False
  • 45
    - Conduction velocity of action potentials in nerve fibers is inversely proportional to their diameter (thickness)
     True
     False
  • 46
    - Conduction velocity of action potentials in non-myelinated nerve fibers is inversely proportional to their diameter (thickness)
     True
     False
  • 47
    - Conduction velocity of action potentials in non-myelinated nerve fibers is usually lower than in myelinated fibers
     True
     False
  • 48
    - Saltatory propagation of action potentials along nerves is performed by neurotransmitters
     True
     False
  • 49
    - The longer the internodes (stages between the Ranvier nodes), the faster the conduction velocity of action potentials along myelinated nerve fibers
     True
     False
  • 50
    - Conduction velocity of action potentials depends on stimulus intensity
     True
     False
  • 51
    - Conduction velocity of action potentials does not depend on stimulus intensity
     True
     False
  • 52
    - Conduction velocity of action potentials in myelinated fibers is lower than in nonmyelinated fibers
     True
     False
  • 53
    - The thinner the nerve fiber, the lower the speed of propagation of action potentials
     True
     False
  • 54
    - The thicker the nerve fiber, the faster the propagation of action potentials
     True
     False
  • 55
    - Conduction velocity of action potentials is identical during both orthodromic and antidromic propagations
     True
     False
  • 56
    - Conduction velocity of action potentials is not identical during orthodromic and antidromic propagations
     True
     False
  • 57
    - During the refractory period of action potential the excitability of the nerve membrane is reduced (potentially this membrane is not excitable at all)
     True
     False
  • 58
    - During the refractory period of action potential the excitability of the nerve membrane is increased
     True
     False
  • 59
    - During the relative refractory period of action potential the membrane is not excitable (irritable) at all
     True
     False
  • 60
    - During the relative refractory period of action potential there is increased membrane excitability (irritability)
     True
     False
  • 61
    - Action potentials propagate in non-myelinated fibers by depolarization (and thus the induction of action potentials) of close (adjacent) neighborhood of the membrane (“continual“ spreading)
     True
     False
  • 62
    - Action potentials propagate in non-myelinated fibers by polarization (and thus the induction of action potentials) of close (adjacent) neighborhood of the membrane (“continual“ spreading)
     True
     False
  • 63
    - Action potentials propagate in myelinated fibers by depolarization (and thus the induction of action potentials) of close (adjacent) neighborhood of the membrane (“saltatory“ spreading)
     True
     False

Comments page 0 of 0
Click here to add a comment
There are currently 0 comments to display.