Question

All are true of myelination EXCEPT results from wrapping of a glial cell plasma membrane around an axon causes transmembrane ion exchange across the entire area of the plasma membrane in the axon restricts Na+/K+ ATPases to only the nodes of an axon increases transmission speed of action potentials QUESTION 8 According to the Nernst equation, the equilibrium membrane potential for Na+ in a typical mammalian cell is ____ at 23 degrees _ at 37 degrees C. more positive; than the same; as less positive; than less negative; than more negative; than QUESTION 9 Opening of which of these would either cause inhibitory postsynaptic potentials or counteract a depolarizing influence given the typical ion distributions of a mammalian cell? Note: to meet these criteria, as long as the channel opening does at least one or another, it fits what's being asked for. Na+ channels Ca 2+ channels K+ channels Cl- channels all of the above B, C, and D C and D

          All are true of myelination EXCEPT
results from wrapping of a glial cell plasma membrane around an axon
causes transmembrane ion exchange across the entire area of the plasma membrane in the axon
restricts Na+/K+ ATPases to only the nodes of an axon
increases transmission speed of action potentials

QUESTION 8
According to the Nernst equation, the equilibrium membrane potential for Na+ in a typical mammalian cell is ______ at 23 degrees ___ at 37 degrees C.
more positive; than
the same; as
less positive; than
less negative; than
more negative; than

QUESTION 9
Opening of which of these would either cause inhibitory postsynaptic potentials or counteract a depolarizing influence given the typical ion distributions of a mammalian cell?
Note: to meet these criteria, as long as the channel opening does at least one or another, it fits what's being asked for.
Na+ channels
Ca 2+ channels
K+ channels
Cl- channels
all of the above
B, C, and D
C and D

All are true of myelination EXCEPT
results from wrapping of a glial cell plasma membrane around an axon
causes transmembrane ion exchange across the entire area of the plasma membrane in the axon
restricts Na+/K+ ATPases to only the nodes of an axon
increases transmission speed of action potentials

QUESTION 8
According to the Nernst equation, the equilibrium membrane potential for Na+ in a typical mammalian cell is at 23 degrees at 37 degrees C.
more positive; than
the same; as
less positive; than
less negative; than
more negative; than

QUESTION 9
Opening of which of these would either cause inhibitory postsynaptic potentials or counteract a depolarizing influence given the typical ion distributions of a mammalian cell?
Note: to meet these criteria, as long as the channel opening does at least one or another, it fits what's being asked for.
Na+ channels
Ca 2+ channels
K+ channels
Cl- channels
all of the above
B, C, and D
C and D

Added by Helen C.

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