1 mitochondrion 2 nucleus 3 sarcoplasmic reticulum 4 muscle fiber 5 myofibril Match each of the options above to the items below. A ______ is an intracellular structure that contains enzymes used to convert the energy in food into fuel muscles can use. A ______ is an elongated cell that runs the length of a muscle. A ______ is a microscopic protein filament that makes up muscle cells. A ______ is an intracellular structure containing the cell's genetic material. The ______ is a lacy membrane surrounding myofibrils that plays an important role in triggering muscle contraction.
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The options are: 1. mitochondrion 2. nucleus 3. sarcoplasmic reticulum 4. muscle fiber 5. myofibril Show more…
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Match the items with the descriptions. You will repeat some choices. Question 1 options: Calcium has to interact with this in order to enable contraction to occur. The action potential runs along this part of the muscle fiber. Repeating contractile units are assembled in a chain in the muscle fiber called this. Myosin contributes to making this. Mitochondria are found in this region of the muscle fiber. This undergoes a conformational change when it associates with calcium. This has to be moved to uncover the myosin-binding sites on actin filaments. t-tubules are a part of this. Calcium voltage-gated channels and calcium pumps are both abundant in this membrane. This membrane does not carry an action potential but it does sense the nearby action potential. 1. sarcolemma 2. sarcoplasmic reticulum 3. troponin 4. tropomyosin 5. sarcoplasm 6. myofibril
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There are several analogous cellular structures in a muscle fiber, some examples of this are the sarcolemma, sarcoplasm, and sarcoplasmic reticulum. (2 pts) Compare and contrast the functions of these structures to normal cellular structures
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