Answer and Explanation:
In rest, attraction strengths between myosin and actin filaments are inhibited by the tropomyosin. When the muscle fiber membrane depolarizes, the action potential caused by this depolarization enters the t-tubules depolarizing the inner portion of the muscle fiber. This activates calcium channels in the T tubules membrane and releases calcium into the sarcolemma. At this point, tropomyosin is obstructing binding sites for myosin on the thin filament. When calcium binds to the troponin C, the troponin T alters the tropomyosin by moving it and then unblocks the binding sites. Myosin heads bind to the uncovered actin-binding sites forming cross-bridges, and while doing it ATP is transformed into ADP and inorganic phosphate which is released. Myofilaments slide impulsed by chemical energy collected in myosin heads, producing a power stroke. The power stroke initiates when the myosin cross-bridge binds to actin. As they slide, ADP molecules are released. A new ATP links to myosin heads and breaks the bindings to the actin filament. Then ATP splits into ADP and phosphate, and the energy produced is accumulated in the myosin heads, which starts a new binding cycle to actin. Z-bands are then pulled toward each other, thus shortening the sarcomere and the I-band, and producing muscle fiber contraction.
Answer:
Differential equations capture the vectors of thr rate of change, which are found experimentally to be tangent to the configuration space of a system.
Explanation:
<span>Minerals have an ordered internal atomic arrangement which means that the atoms which make up the mineral are arranged in an ordered geometric pattern or also known as the crystal structure. Thus, it can be concluded that all minerals are crystals. The crystal structure is the same for the same type of mineral. For example, every piece of quartz found anywhere have the same crystalline structure. </span>
Answer:
The waves move outwards from where the rock hit. When the waves pass the wood, it bobs up and down. In the case of the falling dominoes, the movement of the dominoes was in the direction parallel to the movement of the wave, longitudinal.
Explanation:
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Answer:
Option C thymine is a pyrimidine base in DNA
Explanation:
