Anatomy Final Flashcards

Athletes usually experience muscular fatigue less quickly that nonathletes because they produce less lactic aci The role of ATP in muscle contraction is to supply energy for myofilament movement smooth muscle is found in the wall of the stomach and intestine In a recording of a muscle twitch the delay between the time a stimulus is applied and the time the muscle responds is called the latent period Tendons and ligament are composed primarily of dense connective tissue White muscles have an increased capacity to carry on aerobic respiration false The maintenance of body temperature is realted to the action of skeletal muscles because the more active they are the more heat is released endomysium separates individual muscle fibers true The latent period is the time when the muscle is relaxed false A tendon is characterized by being_____, whereas an aponeurosis is characterized by being_____ cordlike and connects muscles to bones; a broad, fibrous sheet of connective tissue that connects muscles to muscles Which of the following is not true when comparing red and white muscle types red muscles have fewer fitochondria then white Which of the following major events in mucle contraction are stated properly Actin filaments slide inward along myosin filametns Motor unit recruitment refers to the fact that some otor neurons can recruti new skeletal muscle fibers with which they connect false Neurotransmitters are stored in vesicles within motor neuron endings A skeletal muscle fiber conains many nuclei true The type of muscle found in blood vessels is smooth Muscle fatigue is most likely due to an accumulation of lactic acid true The very brief moment following contraction when a muscle remains unresponsive to additional stimulation is called the refractory period The outermost laer of connective tissue surrounding a skeletal muscle is called the epimysium When a muscle undergoes atrophy in response to disuse all of the above The amount of oxygen needed to support the conversion of lactic acid to glycogen is called the oxygen debt Cardiac muscle is found in teh wall of the none fo the above The muscle tissue that can be consciously controlled is skeletal The striated appearance of skeletal muscle results from the sarcomere arrangment Liver cells convert lactic acid to ATP false ATP is related to creatine phosphate by creatine phosphate supplying energy to regenerate ATP from ADP and phosphate A motor unit is defined as a motor neuron and the muscle fibers connected to it If a muscle contracts and its fibers shorten the ontractionis isometric false Creatine phosphate serves to supply energy for the synthesis of ATP During muscle ontraction calcium ions combine with tropomysoin and this exposes active sites for cross-- bridge formation false A muscle cramp is most likely dur to a lack of ATP A neuromuscular junction can be described as all of the above Activities such as swimming and running ar most liely to stimulate development of slow, red muscle fibers Myofibrils are composed primarily of acitn and myosin Compared to skeletal muscle smooth muscle contacts more slowly and relaxes more slowly muscle contracts but does not change length isometric attachment moves isotonic performing curls isotonic doing a headstand isometric standing still isometric anaerobic respiration fast twitch fibers most myoglobin slow twitch fibers resistant to fatigue slow twitch fibers tons of mitochondria slow twitch fibers extenisve SR fast twitch fibers rich blood supply slow twitch fiibers lactic acid build up occurs fast twitch fibers white fibers fast twitch fibers long distance runners slow twitch fibers rapid contractions fast twitch fibers citric acid cycle and electron transport chain aerobic occurs in the cytoplasm anaerobic makes carbon dioxide water and 34 ATP aerobic oxygen required aerobic glycolysis anaerobic amkes pyruvic acid anaerobic forms 2 ATP anaerobic fast twitch fibers anaerobic 34 ATP aerobic by product is lactic acid anaerobic The meninges consist of all of the above