GENERATION AND CONDUCTION OF NERVE IMPULSE

At resting stage,the axonal membrane of a neuron is _________

• Relatively more permeable to Na+ than K+

• Relatively more permeable to K+ than Na+

• Permeable to both K+ and Na+

• Impermeable to both K+ and Na+

Which ions are involved in the electrical nerve impulse?

• IODINE AND POTASSIUM

• IRON AND SODIUM

• SODIUM AND POTASSIUM

• CALCIUM AND IODINE

Depolarization occurs when

• sodium channels open

• potassium channels open

• sodium channels close

• potassium channels close

The voltage difference between the inside and the outside of the neuron when there is no impulse passing is ........

• action potential

• santatory conduction

• resting potential

• resting state

Which of the following gate opens during depolarization

• Na⁺ gates

• K⁺ gates

• Na⁺/K⁺ pump

• H⁺ pump

Which of the following gate opens during repolarization ?

• Na⁺ gates and Na⁺/K⁺ pump

• K⁺ gates and Na⁺/K⁺ pump

• Na ⁺ and K⁺ gates

• Na⁺ gates only