ASU BIO 181 Exam 4 Questions and Answers 100% Verified

ASU BIO 181 Exam 4 Questions and Answers 100% Verified Locomotion - answerMovement of an entire animal Muscle fibers - answerlong, slender cells that make up vertebrate skeletal and cardiac muscle myofibrils - answerfibers that make up muscles Sarcomeres - answerparts of myofibrils-alternating light and dark bands Sliding filament model - answercontraction of the muscle is dependent on how the sarcomeres shorten Actin - answerThin filaments (sarcomere protein) Myosin - answerThicker filaments (sarcomere protein) Dark bands - answerwhere filaments overlap Myosin "head" - answerbinds ATP and actin- changes shape when unit binds Troponin and tropomyosin - answerblock the myosin binding sites on the actin-Regulate muscle activity ACh - answerOn the Muscle cell, triggers depolarization that leads to action potential Transverse Tubules - answerHow action potential propagate and move into muscle cells Action potentials - answertriggers Ca 2+ release Muscle Classes - answer1. Smooth Muscle 2. Cardiac Muscle 3. Skeletal Muscle Smooth Muscle - answerIntestines, arteries, move food, regulate bp, single nucleus, unstriated, unbranched, no sarcomeres Cardiac Muscle - answerHeart, Pump blood, 1 or 2 nuclei, striated, branched, contain sarcomeres Skeletal Muscle - answerAttached to skeleton, move skeleton, multinucleate, striated, unbranched, contain sarcomeres Parasympathetic (Smooth) - answerACh stimulates contraction fo smooth muscle in stomach and intestine Sympathetic (Smooth) - answerNorepinephrine inhibits contraction of smooth muscle in stomach and intestine (Epinephrine also rele