Essentials Of Strength Training And Conditioning Chapter 1 Already Passed

Arterioles {Ans: Small branches of arteries that act as control vessels through which blood enters the capillaries. Play a major role in the regulation of blood flow to the capillaries. Have strong muscular walls that are capable of closing the arteriole completely or allowing it to be dilated many time their size, thus vastly altering blood flow to the capillaries in response to the needs of the tissue}Contraction Phase {Ans: Or a power stroke, which is the actin filament being pulled toward the center of the sarcomere}Exchange of Respiratory Gases {Ans: With ventilation, oxygen diffuses from the alveoli into the pulmonary blood, and the carbon dioxide diffuses from the blood into the alveoli}Actin filaments {Ans: consist of two strands arranged in a double helix.}An action potential is generated along the sarcolemma and the fiber contracts only when a sufficient amount of _________ is released. {Ans: Acetylcholine}Bronchioles {Ans: Each division thereafter the bronchi}