![]() ![]() D) ATPase activity must be opening a channel for the calcium ions to diffuse back into the SR along the concentration gradient. C) ATPase activity must be pumping calcium from the cytosol to the SR against the concentration gradient. B) ATPase activity must be transferring i to the SR to enable this to occur. If a resting muscle cell's cytosol has a free calcium ion concentration of 10-7 while the concentration in the SR is 10-2, then how is the ATPase acting? A) ATPase activity must be powering an inflow of calcium from the outside of the cell into the SR. For example, muscle cells transport calcium from the cytosol into the membranous system called the sarcoplasmic reticulum (SR). Entropy, according to the 2nd law, can indeed remain constant but only. For a reversible process, such as a phase change, S qrev/T. ![]() Which of the following statements concerning entropy change is/are true 1. The greater the extent of irreversibilities during a process, the smaller the entropy generation. Now it appears these efforts to shield government censorship has come down to. For a reversible process, such as a phase change, S qrev/T. The performance of engineering systems is degraded by the presence of irreversibilities. Entropy generation can be used as a quantitative measure of irreversibilities. ![]() Because small increases in calcium ions in the cytosol can trigger a number of different intracellular reactions, cells keep the cytosolic calcium concentration quite low under normal conditions, using ATP-powered calcium pumps. Question: Which of the following statements are true Choose all that apply. Such ATP-powered pumps are often called ATPases, although they do not often hydrolyze ATP unless they are simultaneously transporting ions. 27) A number of systems for pumping ions across membranes are powered by ATP. The following statements are true for entropy EXCEPT entropy is the measure of molecular disorder or randomness Question 2 Q. ![]()
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