Biol-Lec Ch. 10 Quiz

458 Words2 Pages
Biol-2401-31726 Quiz #4 Chap. 10 1) Why does skeletal muscle have sacromeres and smooth muscle does not? Give one detailed reason. Skeletal muscle is most commonly attached to our bones and tendons. So in order for this muscle to be able to endure hard and quick contractions to help move our bones, it has to be strong and tightly put together. In this case the thin and thick filaments of the myofibrils would be much stronger if placed together. So they are, in compartments called sacromeres. Now because the smooth muscle is involuntary and will not be forced to do hard and quick contractions it does not need to be as strong. There for the myofibril thin and thick filaments do not need to be combined in sacromeres. 2) Your patient presents with absolutely no myoglobin. Describe one negative effect of this condition. If someone had absolutely no myoglobin there would be no distribution of oxygen to the muscles. Because myoglobin releases oxygen to the mitochondria when needed for ATP production there would be less ATP. If there is less ATP then the contraction of muscles would also be less and slower. Muscle fatigue may also become present. 3) What might occur if lactic acid did not “burn” when it accumulated in a muscle cell? Would there be an overall negative side effect? If lactic acid did not burn there would be an overall negative side effect to the body. The lactic acid that was produced and diffused into the blood will just continue to collect in the blood stream. The pH levels of the blood will then be thrown off. The glucose that the liver usually converts from the lactic acid is no longer available and cannot be redistributed for more ATP. 4) Imagine all your smooth and cardiac muscle was suddenly under voluntary control only. Describe one positive and one negative aspect this would have for you for one body system. If my smooth and

More about Biol-Lec Ch. 10 Quiz

Open Document