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Who do active cells have large numbers of mitochondria?
Skeletal muscle cells,cardiac muscle cells,sperm cells
What Is a characteristic of a skeletal muscle cell?
A key characteristic of a skeletal muscle cell is its striated appearance, which results from the organized arrangement of actin and myosin filaments within the muscle fibers. These cells are multinucleated, meaning they contain multiple nuclei per cell, which aids in muscle growth and repair. Additionally, skeletal muscle cells are under voluntary control, allowing for conscious movement and coordination.
Where are the myosin filaments found?
Myosin filaments are found in muscle cells, specifically in the thick filaments that make up the myofibrils within the muscle fibers. They are a key component of the sarcomeres, the functional unit of the muscle that is responsible for muscle contraction.
Where are the thin filaments located?
Thin filaments are primarily located within the sarcomeres of skeletal and cardiac muscle cells. They are composed mainly of actin, along with regulatory proteins such as tropomyosin and troponin. These filaments extend from the Z-discs toward the center of the sarcomere, interdigitating with thick filaments during muscle contraction. This arrangement facilitates the sliding filament mechanism, which is essential for muscle contraction.
Cardiac muscle cells are like skeletal muscle cells in that?
Cardiac muscle cells are similar because they have striations which are strands of actin and myosin filaments. They also have mitochondria, transverse tubules, and sarcoplasmic reticulum.Cardiac muscle is different from skeletal muscle in that the muscle is branching, with intercalated dicks at the ends of them, store less calcium, the transverse tubules are larger, and their twitches are longer. Also, the entire cardiac muscle contracts as a whole, regulates itself, and is rhythmic.
Muscle that appears banded?
The muscle that appears banded is skeletal muscle. Its banded appearance, known as striations, is due to the arrangement of muscle fibers and the presence of overlapping sarcomeres containing actin and myosin filaments. Skeletal muscle is responsible for voluntary movements in the body.
Do skeletal muscle cells have one nucleus?
skeletal muscle cells have multiple nuclei in each cell.
Is smooth muscle cells voluntary?
no, skeletal muscle cells are
How During the contraction of muscle cells which fiber is used?
During muscle contraction, the primary fibers used are myofibrils, which consist of two main types of protein filaments: actin (thin filaments) and myosin (thick filaments). When a muscle cell is stimulated, myosin heads attach to actin filaments and pull them inward, resulting in the shortening of the muscle fiber. This process is known as the sliding filament theory, and it is essential for muscle contractions in both skeletal and cardiac muscles.
Which type of muscle is multinucleated striated and in cylinder form?
Skeletal muscle.
How can you tell apart a muscle cell?
Muscle cells can be identified by their elongated and striated appearance, particularly in skeletal muscle, which has a banded pattern due to the arrangement of actin and myosin filaments. They are typically multinucleated, especially in skeletal muscle, whereas cardiac muscle cells have a single central nucleus. Additionally, smooth muscle cells are spindle-shaped and lack striations. The presence of specific proteins like myoglobin in cardiac muscle and smooth muscle's involuntary control further distinguishes them.
What are the muscular cells?
Smooth (organs)Cardiac (heart muscle)Skeletal (movement, support, strength)Muscle cells have a nucleus just like other cells. The basic units of a muscle cell are the actin and myosin filaments that slide past each other to allow flexion and extension of your joints.
