Question

Explain what is happening at the synaptic clef during summation, incomplete tetanus, and tetanus.

Answer 1

During summation, stimulus develops response but its duration depends upon the length of neurons. Generally, it is short, because of lesser length of neurons. The summation process combines excitatory and inhibitory both signals. Therefore, at synaptic cleft, normal concentration of neurotransmitters occurs per stimulus.

In the incomplete tetanus condition, the synaptic cleft shows regular flow of neurotransmitters in lesser interval because the relaxation period per neuron gets decreased due to the incomplete tetanus. It causes multiple contractions but so quick that it makes one large contract in muscles.

In the complete tetanus condition, continuous flow of neurotransmitters occurs because muscles then lack relaxation phase. Now, only one large contraction will occur in muscles.

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