1) Explain how muscles work in pairs in moving limbs.Muscles work in opposite pairs, this means that as one of the muscles contracts, the other muscle relaxes. A perfect example of this is the bicep and the triceps. When the bicep contracts, the triceps relaxes, and it also happens the other way around.
2) Identify the structures that make up a skeletal muscle. Include these terms: muscle fiber, fascicle, myofibrils, actin, myosin, sarcomere.A skeletal muscle is composed of some parallel muscle fibers. Inside these muscle fibers, we can find smaller cells called myofibrils. One of these myofibrils is composed of sacromes. Each sacrome has 2 kinds of filaments, a thin one called the actin, and a thicker one called the myosin.
3) Identify at least 3 organ systems involved in a handshake. Describe WHAT each system contributes to the handshake.Skeletal: holds body upright, and also allows firmness in the arm
Nervous: controls things such as the place where your hand goes and also the grip with which you do the hand shake.
Muscular: allows movements to happen
4) Explain how actin and myosin interact as a muscle cell contracts.Basically what happens is that myosin and actin fuse together, and using the ATP, they relax and contract.
in question 4; you could further explain the interactions with more detail (how do they relax and contract etc..)
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