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The oxidative capacity of muscle refers to its ability to generate energy through aerobic metabolism using oxygen. It depends on factors such as mitochondrial density, enzyme activity, and capillary density, which determine the muscle's efficiency in producing ATP through the citric acid cycle and electron transport chain. Endurance athletes typically have higher oxidative capacity compared to strength athletes.
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What is the similarity between fast oxidative and fast glycolytic muscle fibers?
Both fast oxidative and fast glycolytic muscle fibers are types of fast-twitch muscle fibers that contract quickly and generate a lot of force.
Which color fibers are slow oxidative fibers?
Slow oxidative fibers are typically red in color due to their high myoglobin content, which gives them their oxidative capacity for sustained contractions over long periods of time.
How are slow oxidative fibers in skeletal muscle used during physical activity?
Slow oxidative fibers in skeletal muscle are used during physical activity to provide sustained energy for endurance activities, such as long-distance running or cycling. These fibers are efficient at using oxygen to produce energy through aerobic metabolism, allowing for prolonged muscle contractions without fatigue.
Which tissue have little to no functional regeneration capacity?
Cardiac muscle tissues have little to no functional regeneration capacity. Unlike other tissues in the body, cardiac muscle cells cannot effectively regenerate after injury, which is why heart damage from a heart attack can have lasting effects.
What two mechanisms are used to generate ATP from glucose to muscle cells?
Muscle cells primarily generate ATP from glucose through glycolysis and oxidative phosphorylation. Glycolysis occurs in the cytoplasm and converts glucose into pyruvate, producing some ATP. Pyruvate then enters the mitochondria for oxidative phosphorylation, where it is further oxidized to produce more ATP through the electron transport chain.
Why do type 1 muscle fibers have the most mitochondria?
Because it is oxidative and depends mainly on oxidative phosphorylation for energy.
What is the similarity between fast oxidative and fast glycolytic muscle fibers?
Both fast oxidative and fast glycolytic muscle fibers are types of fast-twitch muscle fibers that contract quickly and generate a lot of force.
What are the types of any muscle fiber?
Slow oxidative fibers Fast oxidative-glycolytic fibers Fast glycolytic fibers
What gives oxidative muscle fibers their red colour?
Presence of myoglobin
What is a fast fiber?
A Fast Oxidative Fiber is a type of muscle fiber with many mitochondria and capillaries. This type has a high myoglobin content. This type of muscle tires more quickly than the slow oxidative fibers and is an intermediate sized muscle. This muscle is good for sprinting and other short, fast-paced activities.
Which color fibers are slow oxidative fibers?
Slow oxidative fibers are typically red in color due to their high myoglobin content, which gives them their oxidative capacity for sustained contractions over long periods of time.
What are the four possible energy sources for a muscle and the three sources of ATP for muscle contraction?
Creatine phosphate, oxidative phosphorylation, and glycolysis.
Why does oxidative capacity increase?
Oxidative capacity increases in response to regular aerobic exercise because it enhances the efficiency of the mitochondria to produce ATP. This adaptation results in improved delivery of oxygen to the muscles and increased utilization of fatty acids as an energy source.
How does exercise increase myoglobin stores?
Myoglobin is a protein within the muscle tissue which acts as an oxygen carrier. As a long term effect of exercise. The ability of the muscles to store myoglobin is increased. Because muscles increase their oxidative capacity through regular exercise, the myoglobin stores also increase because they get used to the demands of exercise and work placed upon them so increase stores as they will be needed. The increase in oxidative capacity is achieved by an increase in the number of mitochondria within the muscle cells, an increase in the supply of ATP and an increase in the quantity of enzymes involved in respiration.
What is the type of muscle that is most resistant to fatigue?
SlowThe slow oxidative muscle fibers are more resistant to fatigue.Cardiac muscle is most resistant to fatigue. Cardiac muscle is constantly working involuntarily to keep us alive by pumping blood through our system. It must be resistant to fatigue for us to be healthy.Intermediate fibers
Does Cardiac muscle has a limited regenerative capacity Cardiac muscle has a limited regenerative capacity?
Yes, it does. Studies that started in 2001 have shown that the cell do.
How are slow oxidative fibers in skeletal muscle used during physical activity?
Slow oxidative fibers in skeletal muscle are used during physical activity to provide sustained energy for endurance activities, such as long-distance running or cycling. These fibers are efficient at using oxygen to produce energy through aerobic metabolism, allowing for prolonged muscle contractions without fatigue.
