AP Psychology Practice Test 2025 – 400 Free Practice Questions to Pass the Exam

The Peripheral Nervous System (PNS) plays a crucial role in connecting the Central Nervous System (CNS) to various parts of the body, including limbs and organs. The PNS consists of nerves that extend throughout the body, allowing the CNS, which is made up of the brain and spinal cord, to communicate with the peripheral tissues. This connection enables the transmission of sensory information to the CNS and motor commands from the CNS to the muscles and glands, facilitating movement and sensory perception.

In contrast, the functions associated with processing thoughts and emotions are primarily the responsibilities of the CNS, specifically the brain. Circulating blood is a function of the cardiovascular system, involving the heart and blood vessels. Absorbing nutrients from food is the role of the digestive system. Thus, the correct choice highlights the essential role of the PNS in the overall communication system of the body.