What is a main sign of inhibition in the CNS? lengthening of time or lack of response; increased response; spreading of a response; the chain nature of a response.

The main sign of inhibition in the CNS is the lengthening of time or lack of response. Inhibition in the central nervous system (CNS) refers to the process of reducing or preventing the occurrence of a particular response or action. This can be achieved through various mechanisms, such as the inhibition of nerve impulses or the suppression of muscle contractions. The lengthening of time or lack of response indicates that the CNS is inhibiting a particular response or action, rather than facilitating it.