After application of one stimulus, the time period in which the second stronger stimuli can from an impulse is called: (A) Absolute refractory period, (B) Relative refraction period, (C) Latent refractory period, (D) Local response
Answer is B. Ans. (b) Relative refraction period(Ref: Ganong, 25th ed/p.90)Absolute refractory period - No stimulus, no matter how strong, will not excite the nerve during absolute refractory periodRelative refractory period - Stronger than normal stimulus (suprathreshold stimulus) produces action potential in relative refractory period