Neuron nerve impulse synapse

NCERT Biology Class 11, Chapter 18

Neuron nerve impulse synapse NEET Biology MCQ

Last updated: July 30, 2026

Reviewed by MedQGo Editorial Team | Last updated: July 30, 2026

If two stimuli are given with increasing closeness in time to the sciatic nerve of a frog, the amplitude of the second action potential will

Agradually increase

Bgraditionally decrease

Cfirst increase then decrease

Dfirst decrease then increase

Correct answer: B. graditionally decrease

The amplitude of the second action potential gradually decreases due to the decremental conduction of nerve impulses in myelinated fibers.

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More Neuron nerve impulse synapse MCQs

When a postsynaptic neuron is excited, the action potential generally first erupts in the axon hillock mainly due to If the Na+ concentration in the bathing solution of an isolated nerve fiber is reduced, then the overshoot value of the action potential in a single nerve fiber will Which of the following membrane potentials is entirely determined by the intrinsic electrical properties of the membrane without activation of ion channels?During the depolarization phase of an action potential in a nerve fiber, the membrane potential value exceeding 0mV is called Which of the following describes the mechanism for the formation of the repolarization phase in a nerve fiber action potential?