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1. The three muscle types would be expected to be affected are skeletal, smooth and cardiac muscles.
It is likely that William's neck and jaw muscles were affected by the injury. These muscles are called skeletal muscles, and they are responsible for voluntary movement of the body. When a person experiences muscle spasms, it is typically the skeletal muscles that are affected. In this case, it is likely that the injury to William's foot caused the muscle spasms in his neck and jaw.
In addition to skeletal muscles, the human body also has two other types of muscle tissue: smooth muscle and cardiac muscle. Smooth muscle is found in the walls of organs such as the stomach and intestines, and it is responsible for involuntary movements such as digestion. Cardiac muscle is found in the heart, and it is responsible for pumping blood throughout the body.
2. The five properties of skeletal muscle tissue/cells are explaining below. Skeletal muscle tissue is made up of cells called muscle fibers. These fibers have five main properties:
- Excitability, or the ability to receive and respond to stimuli such as nerve impulses.
- Conductivity, or the ability to transmit nerve impulses from one part of the muscle to another.
- Contractility, or the ability to shorten and produce movement when stimulated.
- Extensibility, or the ability to stretch and lengthen when pulled.
- Elasticity, or the ability to return to their original shape after being stretched or contracted.
Together, these properties allow skeletal muscle cells to produce the movements necessary for body functions such as walking, breathing, and speaking.
3. The structural components of the myofibril, including the proteins associated with the thick and thin myofilaments is the basic unit of skeletal muscle tissue. It is a long, cylindrical structure that is made up of many smaller components, including thick and thin filaments.
The thick filaments are made up primarily of the protein myosin, which has a rod-like shape with globular heads at each end. The thin filaments are made up of the protein actin, which has a thread-like shape.
Both the thick and thin filaments are arranged in a specific pattern within the myofibril. The thick filaments are positioned in the center of the myofibril, with the thin filaments arranged around them in a spiral pattern.
In addition to the thick and thin filaments, the myofibril also contains other proteins that help to regulate muscle contraction. These include the proteins tropomyosin and troponin, which play a role in the activation of the myosin heads, and the protein titin, which helps to maintain the structure of the myofibril.
Together, these structural components allow the myofibril to contract and produce movement in response to stimuli.
4. The following statements accurately describes how the sarcomeres would look in the head and neck muscles would likely be arranged in a regular, repeating pattern. Sarcomeres are the functional units of skeletal muscle tissue, and they are composed of the thick and thin filaments described above.
These filaments are arranged in a specific pattern within the myofibril, with the thick filaments in the center and the thin filaments arranged around them in a spiral pattern. This pattern is repeated throughout the muscle, forming a series of sarcomeres that give skeletal muscle its characteristic striated appearance.
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