Neural coordination is

$I.Q.$ is the ratio of mental age to

The minimum time interval required between the application of a stimulus and the production of a response is known as:

Which of the following systems are involved in the regulation and coordination of the human body?
$I -$ Digestive system
$II -$ Endocrine system
$III -$ Excretory system
$IV -$ Nervous system
$V -$ Reproductive system

The minimum time for which the stimulus must be applied in order to obtain a response is known as:

In humans,rapid coordination of functional activities is achieved by which of the following?