PrepBharat

1. The dorsal nerve root ganglion is
a) Bipolar
b) Unipolar
c) Pseudounipolar
d) Multipolar

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2. In spiral cord of humans, the grey matter is _____ shaped.
a) Circular
b) Irregular
c) Butterfly
d) All of these

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3. White matter is _____ in brain and _____ in spiral cord (in case of humans)
a) Outside, inside
b) In, out
c) In, in
d) Out, out

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4. Resting axonal membrane is
a) Unpolarized
b) Unpolarized and more permeable to \[K^{+}\]
c) Polarized and more permeable to \[Na^{+}\]
d) Polarized and more permeable to \[K^{+}\]

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5. Na/K pumps transports
a) \[3Na^{+}\] out for \[2K^{+}\] in
b) \[3Na^{+}\] in for \[2K^{+}\] out
c) \[2Na^{+}\] out for \[3K^{+}\] in
d) \[2Na^{+}\] in for \[3K^{+}\] out

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6. Which of the following is true about neural membrane?
a) Different type of ion channels present.
b) Ion channels are selectively permeable.
c) Impermeable to negatively charged protein present in axoplasm.
d) All the above

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7. Axoplasm have (polarized)
a) High \[K^{+}\] ion
b) Low \[Na^{+}\] ion
c) Negatively charged proteins
d) All of these

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8. The electrical potential difference across the resting plasma membrane is called as
a) Spike potential
b) Action potential
c) Resting potential
d) All of these

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9.Depolarization occurs due to
a) Influx of \[Na^{+}\]
b) Eflux of \[Na^{+}\]
c) Influx of \[K^{+}\]
d) Eflux of \[K^{+}\]

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10. The correct sequence for depolarization and repolarization is
(A) Stimulus applied at a site on polarized membrane
(B) Increase the permeability for \[Na^{+}\]
(C) Generation of A.P.(Action Potential)
(D) Increase the permeability for \[K^{+}\]
(E) Restoration of membrane potential
a) A → B → C → D → E
b) B → A → C → D → E
c) A → D → C → B → E
d) A → B → D → C → E

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