Final answer:
The CNS is responsible for sending motor signals to muscles to make them contract and to glands to stimulate secretion, via the somatic and autonomic nervous systems.
Step-by-step explanation:
The question is asking about the role of the central nervous system (CNS) in controlling bodily functions, particularly in relation to muscle contraction and gland secretion. Most signals that stimulate muscles to contract and glands to secrete originate in the CNS. The nervous system can be divided into the somatic nervous system and the autonomic nervous system. The somatic nervous system is responsible for voluntary movements by sending motor signals from the CNS to the skeletal muscles, making them contract. The autonomic nervous system controls involuntary functions like gland secretion and the contraction of smooth and cardiac muscle tissue.