Movement, posture, and heat production describe the functions of which system?

Movement, posture, and heat production describe the functions of which system?

• A. Muscular system
• B. Digestive system
• C. Nervous system
• D. Circulatory system

Answer: (A)

Movement and posture come from skeletal muscles contracting to pull on bones and hold the body in position. Heat production happens because muscle contractions use energy, and that energy release shows up as heat, helping to keep body temperature up (and shivering increases muscle activity to generate even more heat). The muscular system is responsible for these direct roles, with the nervous system signaling the muscles to contract and the circulatory system supplying oxygen and removing waste, but the functions described are those of the muscles themselves.

Movement and posture come from skeletal muscles contracting to pull on bones and hold the body in position. Heat production happens because muscle contractions use energy, and that energy release shows up as heat, helping to keep body temperature up (and shivering increases muscle activity to generate even more heat). The muscular system is responsible for these direct roles, with the nervous system signaling the muscles to contract and the circulatory system supplying oxygen and removing waste, but the functions described are those of the muscles themselves.