What system is responsible for carrying out responses initiated by stimuli in the CNS?

The correct answer highlights the role of the Peripheral Nervous System (PNS) in relaying responses initiated by the central nervous system (CNS). The PNS is primarily responsible for connecting the CNS to the limbs and organs. It functions to transmit sensory information to the CNS, as well as carry out motor commands from the CNS to the rest of the body. This interaction is essential for enabling movement, reflex actions, and the execution of voluntary and involuntary functions.

The PNS is divided into two main components: the somatic nervous system, which controls voluntary movements, and the autonomic nervous system (ANS), which manages involuntary functions such as heart rate and digestion. Given its function as a communication relay between the CNS and the rest of the body, the PNS is integral in executing the body's responses to stimuli processed by the CNS. Understanding this system and its functions is critical for comprehending how the body regulates and responds to environmental changes.