284574
During the propagation of a nerve impulse, the action potential results from the movement of
1 \(\mathrm{K}^{+}\)ions from extracellular fluid to intracellular fluid
2 \(\mathrm{Na}^{+}\)ions from intracellular fluid to extracellular fluid
3 \(\mathrm{K}^{+}\)ions from intracellular fluid to extracellular fluid
4 \(\mathrm{Na}^{+}\)ions from extracellular fluid to intracellular fluid
Explanation:
D During the propagation of nerve impulse when a stimulus of adequate strength is applied to a polarized membrane, the permeability of the membrane to \(\mathrm{Na}^{+}\)is greatly increased at the point of stimulation. As a result, the sodium ion channels permit the influx of \(\mathrm{Na}^{+}\)by diffusion. Since, there are more \(\mathrm{Na}^{+}\)ions entering than leaving, the electrical potential of the membrane change from \(-70 \mathrm{mV}\) towards zero.
JIPMER-2012
Neural Control and Coordination
284575
Depolarization of axolemma during nerve conduction takes place because of:
1 Equal amount of \(\mathrm{Na}^{+} \& \mathrm{~K}^{+}\)move out across axolema
2 \(\mathrm{Na}^{+}\)move inside and \(\mathrm{K}^{+}\)move more out side
3 More \(\mathrm{Na}+\) outside
4 None
Explanation:
B During nerve conduction, the depolarization phase is primarily caused by the influx (move inside) of sodium ions into the neuron, and the repolarization phase is facilitated by the efflux (move outside) of potassium ions. This movement of ions across the axolemma is essential for transmitting nerve impulses along the neuron.
AIPMT-2000
Neural Control and Coordination
284576
Effect of anaesthetics on body :
1 Inhibits \(\mathrm{Na}^{+}-\mathrm{K}^{+}\)pump
2 Kills nerves
3 Stops brain functions
4 Inactivates skin cells
Explanation:
A Anaesthetics inhibit the sodium-potassium pump, disrupting the normal flow of ions in neurons. This reduces the ability of neuron to transmit signals, leading to a loss of sensation or consciousness.
AIPMT-1998
Neural Control and Coordination
284580
ANF carries out following functions except
1 Vasodilation
2 Inhibition of renin-angiotensin mechanism
3 Vasoconstriction
4 Promotes sodium excretion
Explanation:
C ANF (atrial natriuretic factor) does not promote vasoconstriction. It primarily promotes vasodilation, inhibits the rennin-angiotensin mechanism, and promotes sodium excretion.
284574
During the propagation of a nerve impulse, the action potential results from the movement of
1 \(\mathrm{K}^{+}\)ions from extracellular fluid to intracellular fluid
2 \(\mathrm{Na}^{+}\)ions from intracellular fluid to extracellular fluid
3 \(\mathrm{K}^{+}\)ions from intracellular fluid to extracellular fluid
4 \(\mathrm{Na}^{+}\)ions from extracellular fluid to intracellular fluid
Explanation:
D During the propagation of nerve impulse when a stimulus of adequate strength is applied to a polarized membrane, the permeability of the membrane to \(\mathrm{Na}^{+}\)is greatly increased at the point of stimulation. As a result, the sodium ion channels permit the influx of \(\mathrm{Na}^{+}\)by diffusion. Since, there are more \(\mathrm{Na}^{+}\)ions entering than leaving, the electrical potential of the membrane change from \(-70 \mathrm{mV}\) towards zero.
JIPMER-2012
Neural Control and Coordination
284575
Depolarization of axolemma during nerve conduction takes place because of:
1 Equal amount of \(\mathrm{Na}^{+} \& \mathrm{~K}^{+}\)move out across axolema
2 \(\mathrm{Na}^{+}\)move inside and \(\mathrm{K}^{+}\)move more out side
3 More \(\mathrm{Na}+\) outside
4 None
Explanation:
B During nerve conduction, the depolarization phase is primarily caused by the influx (move inside) of sodium ions into the neuron, and the repolarization phase is facilitated by the efflux (move outside) of potassium ions. This movement of ions across the axolemma is essential for transmitting nerve impulses along the neuron.
AIPMT-2000
Neural Control and Coordination
284576
Effect of anaesthetics on body :
1 Inhibits \(\mathrm{Na}^{+}-\mathrm{K}^{+}\)pump
2 Kills nerves
3 Stops brain functions
4 Inactivates skin cells
Explanation:
A Anaesthetics inhibit the sodium-potassium pump, disrupting the normal flow of ions in neurons. This reduces the ability of neuron to transmit signals, leading to a loss of sensation or consciousness.
AIPMT-1998
Neural Control and Coordination
284580
ANF carries out following functions except
1 Vasodilation
2 Inhibition of renin-angiotensin mechanism
3 Vasoconstriction
4 Promotes sodium excretion
Explanation:
C ANF (atrial natriuretic factor) does not promote vasoconstriction. It primarily promotes vasodilation, inhibits the rennin-angiotensin mechanism, and promotes sodium excretion.
284574
During the propagation of a nerve impulse, the action potential results from the movement of
1 \(\mathrm{K}^{+}\)ions from extracellular fluid to intracellular fluid
2 \(\mathrm{Na}^{+}\)ions from intracellular fluid to extracellular fluid
3 \(\mathrm{K}^{+}\)ions from intracellular fluid to extracellular fluid
4 \(\mathrm{Na}^{+}\)ions from extracellular fluid to intracellular fluid
Explanation:
D During the propagation of nerve impulse when a stimulus of adequate strength is applied to a polarized membrane, the permeability of the membrane to \(\mathrm{Na}^{+}\)is greatly increased at the point of stimulation. As a result, the sodium ion channels permit the influx of \(\mathrm{Na}^{+}\)by diffusion. Since, there are more \(\mathrm{Na}^{+}\)ions entering than leaving, the electrical potential of the membrane change from \(-70 \mathrm{mV}\) towards zero.
JIPMER-2012
Neural Control and Coordination
284575
Depolarization of axolemma during nerve conduction takes place because of:
1 Equal amount of \(\mathrm{Na}^{+} \& \mathrm{~K}^{+}\)move out across axolema
2 \(\mathrm{Na}^{+}\)move inside and \(\mathrm{K}^{+}\)move more out side
3 More \(\mathrm{Na}+\) outside
4 None
Explanation:
B During nerve conduction, the depolarization phase is primarily caused by the influx (move inside) of sodium ions into the neuron, and the repolarization phase is facilitated by the efflux (move outside) of potassium ions. This movement of ions across the axolemma is essential for transmitting nerve impulses along the neuron.
AIPMT-2000
Neural Control and Coordination
284576
Effect of anaesthetics on body :
1 Inhibits \(\mathrm{Na}^{+}-\mathrm{K}^{+}\)pump
2 Kills nerves
3 Stops brain functions
4 Inactivates skin cells
Explanation:
A Anaesthetics inhibit the sodium-potassium pump, disrupting the normal flow of ions in neurons. This reduces the ability of neuron to transmit signals, leading to a loss of sensation or consciousness.
AIPMT-1998
Neural Control and Coordination
284580
ANF carries out following functions except
1 Vasodilation
2 Inhibition of renin-angiotensin mechanism
3 Vasoconstriction
4 Promotes sodium excretion
Explanation:
C ANF (atrial natriuretic factor) does not promote vasoconstriction. It primarily promotes vasodilation, inhibits the rennin-angiotensin mechanism, and promotes sodium excretion.
NEET Test Series from KOTA - 10 Papers In MS WORD
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Neural Control and Coordination
284574
During the propagation of a nerve impulse, the action potential results from the movement of
1 \(\mathrm{K}^{+}\)ions from extracellular fluid to intracellular fluid
2 \(\mathrm{Na}^{+}\)ions from intracellular fluid to extracellular fluid
3 \(\mathrm{K}^{+}\)ions from intracellular fluid to extracellular fluid
4 \(\mathrm{Na}^{+}\)ions from extracellular fluid to intracellular fluid
Explanation:
D During the propagation of nerve impulse when a stimulus of adequate strength is applied to a polarized membrane, the permeability of the membrane to \(\mathrm{Na}^{+}\)is greatly increased at the point of stimulation. As a result, the sodium ion channels permit the influx of \(\mathrm{Na}^{+}\)by diffusion. Since, there are more \(\mathrm{Na}^{+}\)ions entering than leaving, the electrical potential of the membrane change from \(-70 \mathrm{mV}\) towards zero.
JIPMER-2012
Neural Control and Coordination
284575
Depolarization of axolemma during nerve conduction takes place because of:
1 Equal amount of \(\mathrm{Na}^{+} \& \mathrm{~K}^{+}\)move out across axolema
2 \(\mathrm{Na}^{+}\)move inside and \(\mathrm{K}^{+}\)move more out side
3 More \(\mathrm{Na}+\) outside
4 None
Explanation:
B During nerve conduction, the depolarization phase is primarily caused by the influx (move inside) of sodium ions into the neuron, and the repolarization phase is facilitated by the efflux (move outside) of potassium ions. This movement of ions across the axolemma is essential for transmitting nerve impulses along the neuron.
AIPMT-2000
Neural Control and Coordination
284576
Effect of anaesthetics on body :
1 Inhibits \(\mathrm{Na}^{+}-\mathrm{K}^{+}\)pump
2 Kills nerves
3 Stops brain functions
4 Inactivates skin cells
Explanation:
A Anaesthetics inhibit the sodium-potassium pump, disrupting the normal flow of ions in neurons. This reduces the ability of neuron to transmit signals, leading to a loss of sensation or consciousness.
AIPMT-1998
Neural Control and Coordination
284580
ANF carries out following functions except
1 Vasodilation
2 Inhibition of renin-angiotensin mechanism
3 Vasoconstriction
4 Promotes sodium excretion
Explanation:
C ANF (atrial natriuretic factor) does not promote vasoconstriction. It primarily promotes vasodilation, inhibits the rennin-angiotensin mechanism, and promotes sodium excretion.
