Answer:
Absolute refractory period
Explanation:
The absolute refractory period is short in an action potential. During the refractory period, there is no occurrence of another action potential. There would occur two types of refractory periods
Absolute refractory periods: Absolute period is the period when another action potential won't occur immediately after a first action potential. This refractory period also called an effective refractory period. This period happened because the sodium channel is inactivated and is stable in the same way until the hyper polarization does not occur.
Relative refractory period:
The answer is unconditioned stimulus and unconditioned response in which in classical conditioning if the sour taste of lemon juice spontaneously reasons the mouth to pucker the lemon juice is the unconditioned stimulus and the pucker of the lips and tongue is the unconditioned response. In addition, classical conditioning plays a significant role in which the progress of emotional responses such as anxiety or embarrassment.
