Muscular System Research Paper
The Muscular System
Teacher pages
The muscular system allows us to move. Adults have a certain fixed number of muscle cells, approximately 602. . Through exercise, such as weight lifting, the cells enlarge but the number of cells does not increase.
Structure and Function
There are three types of muscle tissue—smooth, skeletal, and cardiac. Each has its own distinctive function, and therefore, its own distinctive structure, but all muscles allow movement of some kind.
Skeletal Muscle Skeletal muscle is called voluntary because you can control this type of muscle. You can voluntarily choose to move them. These muscles attach to bones, move the skeleton, and are found in the arms, legs, neck, or anywhere you can voluntarily move a body part. These muscles produce strong contractions.
Structurally, these muscle …show more content…
Strength is not needed for the involuntary actions of the digestive system or associated organs.
Cardiac muscle cells are striated (for strength), multi-nucleated (for additional control) and branched (for added strength). Heart muscle cells must have the strength and the control needed for efficient heart action.
4, Explain the mechanism for muscle contraction.
The sliding filament model of muscle explains how muscle contraction occurs. Muscle fibers made of thick fibers called myosin and thin filaments called actin form a bridge. Using energy from cellular respiration, the filaments shorten and the fibers pull closer together. The bridge then releases and connects again to a filament to contract again. This cycle repeats and the muscle fibers get shorter and shorter.
5. Why would a disease that causes paralysis of smooth muscles be especially serious?
Internal organs use smooth muscles for movement. Smooth muscles are involuntary muscles and if paralysis occurs, involuntary functions such as breathing may
Teacher pages
The muscular system allows us to move. Adults have a certain fixed number of muscle cells, approximately 602. . Through exercise, such as weight lifting, the cells enlarge but the number of cells does not increase.
Structure and Function
There are three types of muscle tissue—smooth, skeletal, and cardiac. Each has its own distinctive function, and therefore, its own distinctive structure, but all muscles allow movement of some kind.
Skeletal Muscle Skeletal muscle is called voluntary because you can control this type of muscle. You can voluntarily choose to move them. These muscles attach to bones, move the skeleton, and are found in the arms, legs, neck, or anywhere you can voluntarily move a body part. These muscles produce strong contractions.
Structurally, these muscle …show more content…
Strength is not needed for the involuntary actions of the digestive system or associated organs.
Cardiac muscle cells are striated (for strength), multi-nucleated (for additional control) and branched (for added strength). Heart muscle cells must have the strength and the control needed for efficient heart action.
4, Explain the mechanism for muscle contraction.
The sliding filament model of muscle explains how muscle contraction occurs. Muscle fibers made of thick fibers called myosin and thin filaments called actin form a bridge. Using energy from cellular respiration, the filaments shorten and the fibers pull closer together. The bridge then releases and connects again to a filament to contract again. This cycle repeats and the muscle fibers get shorter and shorter.
5. Why would a disease that causes paralysis of smooth muscles be especially serious?
Internal organs use smooth muscles for movement. Smooth muscles are involuntary muscles and if paralysis occurs, involuntary functions such as breathing may