Ronda, James P. (1998). Voyages of Discovery: Essays on the Lewis and Clark Expedition. Montana Historical Society Press, Helena, MT. Woodger, Elin and Brandon Toropov (2004). Encyclopedia of the Lewis and Clark Expedition. Facts on File, New York, NY. You can uncover more fascinating food history on Toriâs website: The History Kitchen.
Muscle contraction results from an attachmentâdetachment cycle between the myosin heads extending from myosin filaments and the sites on actin filaments. The myosin head first attaches to actin together with the products of ATP hydrolysis, performs a power stroke associated with release of hydrolysis products, and detaches from actin upon binding with new ATP. The detached myosin head then hydrolyses ATP, and performs a recovery stroke to restore its initial position.
Which of the following statements about muscle contraction is FALSE? Myosin cross-bridges remain in place until the myosin head binds an ATP molecule. In the resting state, a myosin head is bound to an ADP and a phosphate molecule that have been produced by splitting an ATP molecule. When Ca2+ binds to a myosin head, it triggers the formation of a cross-bridge between myosin and actin.