Can someone please help?? "today you have learned about muscle fibers write a 250 word essay about muscles that include an introduction, body, and conclusion be sure to cite your sources Key words to use: 3 different types of muscles - skeletal muscle striated muscle smooth muscle cardiac muscle muscle fibers slow twitch muscles fast twitch muscles muscle contractions concentric contraction eccentric contraction isometric contraction"

The muscular system is responsible for functions such as maintenance of posture, locomotion, and control of various circulatory systems. Muscle tissue can be divided functionally (voluntarily or involuntarily controlled) and morphologically ( striated or non-striated). These classifications describe three distinct muscle types: skeletal, cardiac and smooth. Skeletal muscle is voluntary and striated, cardiac muscle is involuntary and striated, and smooth muscle is involuntary and non-striated.

Key Terms:

myofibril: A fiber made up of several myofilaments that facilitates the generation of tension in a myocyte.

myofilament: A filament composed of either multiple myosin or actin proteins that slide over each other to generate tension.

myosin: A motor protein which forms myofilaments that interact with actin filaments to generate tension.

actin: A protein which forms myofilaments that interact with myosin filaments to generate tension.

striated: The striped appearance of certain muscle types in which myofibrils are aligned to produce a constant directional tension.

voluntary: A muscle movement under conscious control (e.g. deciding to move the forearm).

involuntary: A muscle movement not under conscious control (e.g. the beating of the heart).

myocyte: A muscle cell.

Explanation: Sorry if im wrong

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