Which of the statements regarding muscle contraction are true and which are false? - The nerve impulses for contraction originate in the parietal lobes of the cerebrum. - Muscle contraction moves the skeleton. - Coordination of voluntary movement is regulated by the frontal lobes. - Muscle contraction requires delivery of oxygen by the circulatory system. - Muscle tone may increase in a cold environment. - Synergistic muscles work together. A.True B.False