1. Explain how muscles work in pairs in moving limbs.
Muscles move body parts by contracting and realaxing, by working in pairs: flexors and extensors. One muscle contracts while the other relaxes.
2. Identify the structures that make up a skeletal muscle.
They are voluntary muscles in the bones. They contain the muscle fibers (inside the muscle), the fibrils (inside the fibers), the myofibrils (inside the fibrils), and finally the actin (thin filament) and the myosin (thick filament). Both located inside the myofibrils.
3. Identify at least three organ systems involved in a handshake. Describe what each system contributes to the handshake.
The Intergumentary System: The sensation of the skin.
The Nervous System: The nerves react while toaching the others persons hand.
The Skeletal System: The bones move while the handshake is being made.
The Muscle System: The muscles is what do the movement.
4. Explain how actin and myosin interact as a muscle cell contracts.
Actin is the thin filament inside myofbrils, and myosin the thick filament inside the myofibrils. Both are proteins that pruduce the muscle contraction.
Your answers are very precise, but for question number three you may want to develop a little but more by including examples for each organ systen¡m that is working. for example the nervous system=eyes or something like that
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