<Li> Assuming the travel distance is equivalent, neural signals can be transmitted much more quickly (in the range of milliseconds) than can hormonal signals (in the range of seconds, minutes, or hours). Neural signals can be sent at speeds up to 100 meters per second . </Li> <Li> Neural signalling is an all - or - nothing (digital) action, whereas hormonal signalling is an action that can be continuously variable as dependent upon hormone concentration . </Li> <P> Hormone transport and the involvement of binding proteins is an essential aspect when considering the function of hormones . There are several benefits with the formation of a complex with a binding protein: the effective half - life of the bound hormone is increased; a reservoir of bound hormones is created, which evens the variations in concentration of unbound hormones (bound hormones will replace the unbound hormones when these are eliminated). </P> <P> The discovery of hormones and endocrine signaling occurred during studies of how the digestive system regulates its activities, as explained at Secretin § Discovery . </P>

Which of the following is not a description of hormone interaction explained in the text