0
What else can I help you with?
Why do slow twitch muscle fibers have more mitochondria compared to fast twitch muscle fibers?
Slow twitch muscle fibers have more mitochondria compared to fast twitch muscle fibers because they rely more on aerobic metabolism for energy production, which requires a higher number of mitochondria to generate ATP efficiently.
Why do slow twitch muscle fibers have more mitochondria than fast twitch muscle fibers?
Slow twitch muscle fibers have more mitochondria than fast twitch muscle fibers because they rely more on aerobic metabolism to produce energy for sustained, endurance activities. Mitochondria are the powerhouse of the cell and are responsible for producing energy in the form of ATP through aerobic respiration. Since slow twitch fibers require more sustained energy production, they have more mitochondria to support this process compared to fast twitch fibers, which rely more on anaerobic metabolism for quick bursts of energy.
What kind of muscle tissue has the most mitochondria in it?
Type I muscle fibers
How many mitochondria are there in skeletal muscle?
It depends on the type of skeletal muscle. Slow and fast oxidative fibers (type I and type IIa) may have many mitochondria. Fast glycolytic fibers (type IIx/IIb) have very few mitochondria. This is because in fast glycolytic fibers (type IIx/IIb) ATP can be produced outside of the mitochondrion in the cytosol of the cell due to high concentrations of glycolytic enzymes present in these fibers. In contrast, in oxidative fibers ATP is produced mostly within the mitochondrion, so more mitochondria are needed to to produce large amounts of ATP. Also, the number of mitochondria in these cells can increase with adaptations to exercise conditioning.
What is the innermost part of the muscle?
There are two types of muscle in the body. The Cardiac Muscle and the Skeletal Muscle. The skeletal muscle is made up of intrafusal and extrafusal fibers. The Muscle Belly is made up entirely of extrafusal fibers (even in the deepest parts). The intrafusal fibers are located throughout the muscle. The cardiac muscle is distinct from skeletal muscle, one of the main differences is the amount of mitochondria it has is increased, and so technically at the deepest part of cardiac muscle is mitochondria (but there are other components as well).
Which cell has largest number of mitochondria?
Muscle cells, especially those found in heart muscle (cardiac muscle) and slow-twitch skeletal muscle fibers, tend to have the largest number of mitochondria due to their high energy demands. This allows them to efficiently produce the ATP needed for sustained muscle contractions.
Do all types of muscle fibers produce movement?
No, intrafusal fibers don't contract.
What organelle would be most common in a muscle cell?
Mitochondria - to produce the ATP needed for muscle contraction
When viewed under a microscope a sample of tissue reveals striations and long thin fibers that contain many nuclei and mitochondria. What type of tissue is most likely being viewed?
The tissue most likely being viewed is skeletal muscle tissue. Skeletal muscle tissue is composed of long and thin fibers called muscle fibers that exhibit striations due to the arrangement of contractile proteins. These muscle fibers contain multiple nuclei and mitochondria to support their high energy demands.
How is energy supplied to muscle fibers for contraction?
Energy to muscles is supplied through mitochondria making ATP using oxygen. Muscle cells use a tremendous amount of energy so they have large numbers of mitochondria.
Why do type 1 muscle fibers have the most mitochondria?
Because it is oxidative and depends mainly on oxidative phosphorylation for energy.
What is role of spindle fibers?
Spindle-shaped muscle fibers are skeletal muscles that produce external mobility to the body.
