Which of the following statements about muscle movement is true?
A) The only thing that muscles can do is contract.
B) A single muscle can bend a joint by contracting and straighten it by relaxing.
C) Smooth muscles cause movement by contracting, while striated muscles cause movement by contracting and relaxing.
D) Striated muscles cause movement by contracting, but smooth muscles cause movement by contracting and relaxing.

Question

Quizplus · Accepted Answer

Muscles can only cause movement by contracting. They work in pairs or groups where one muscle contracts to move a body part in one direction, and another muscle contracts to move it back. Relaxation of a muscle simply means it returns to its resting state, allowing its partner muscle to contract and move the body part in the opposite direction.

Which of the Following Statements About Muscle Movement Is True