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.
What Happens Physiologically. During a head rush, a person's blood pressure drops suddenly and the body is not able to correct it quickly enough. Usually, the heart speeds up and blood vessels contract when blood pressure falls; both of these involuntary actions work to increase the pressure.