What are the main types of cellular work? How does ATP provide the energy for this work?

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Accepted Answer

Welcome back. Let's look at our next question. It says the skeletal muscle cells have little stored a teepee, which they can use immediately which of the following A. T. P. Sources can supply them with immediate 80 P. At a very high rate to keep them working. So we have four answer possibilities. There are all sources of a T. P. But we're looking for which of these four things can supply muscle cells with immediate 80 P at a very high rate. So let's look at our four choices. They are a glycogen, be fat reserves. See creatine phosphate and D. Protein. And what we're looking for is for C. Creatine phosphate. Creatine phosphate is a foss for elated form of creatine. That is a rapid reserve of high energy phosphate. So the high energy phosphate group from creatine phosphate can be used to make a teepee from ADP very rapidly in skeletal muscles and it can supply the energy needed for working muscle at a very high rate but only for about 8 to 10 seconds. So this is kind of the immediate bam right away tons of a teepee but not for long term usage. But it is what we're looking for is immediate a TP at a very high rate. So that's creating phosphate. Let's just look at our other answer choices to understand why they're not correct. We've got choice a glycogen and glycogen. Of course, we know uh from our content video that glycogen is a carbohydrate used for storage. Um it's made up of glucose units. So it can be broken down to make a T. P. From glucose. So the glycogen can be broken down into glucose which can be broken down for A. T. P. However this takes about 12 chemical reactions to produce the A. T. P. So it supplies energy a bit more slowly than the creatine phosphate. So it's slower than the creatine phosphate. It's not the immediate source of a teepee. So it's there, its reserves of energy but not immediate. So not our answer. And then finally. Choice B. And choice de fat reserves and protein. Both fat reserves and protein can be used when oxygen is present for aerobic respiration. And that also involves the breakdown of glucose to produce A. T. P. But this involves even more chemical reactions than the breakdown of glycogen. Um glycogen you just have, it's a polymer of glucose. So that's a more direct process aerobic respiration as we recall the whole um cyclical process much longer. So this is much slower then glycogen however, it's useful because as long as you have oxygen available it can keep on producing A. T. P. For hours or longer um As long as that oxygen is available. And that cycle can keep going. So it's more of the long term a TB source. But it's not our answer. Neither B nor D. Because again we're looking for an immediate source of a TP at a very high rate for those skeletal muscle cells. And that is choice. See creatine phosphate. See you in the next video.

What are the main types of cellular work? How does ATP provide the energy for this work?

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Key Concepts

Types of Cellular Work

ATP (Adenosine Triphosphate)

Energy Coupling