Straighterline BIO 201L Lab 7 Worksheet Lab 7 The Muscular System 2022 | Complete | 100% Correct Answers

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Pre-Lab Questions ”1. How do banding patterns change when a muscle contracts?” The myosin myofilaments and actin decreases in lengt and compact closely following the contractrion of muscles. Th... e A band lacks changes while both I and H zones narrows. ”2. What is the difference between a muscle organ, a muscle fiber, myofibril and a myofilament? ” The muscle organs composed of tissues involving fibers and cells that generate movement on the entire body resulting to contractions. The muscle fibers encompasses the myofibrils wich contract during activation and contail multiple nulei. The myofibrils involves thread-like sthructures comprised of myosin and actin. Myofilaments ar building components of the myofibrils. ”3. Outline the molecular mechanism for skeletal muscle contraction. At what point is ATP used and why? ” The ATP undergoes metabolic conversion to pi and ADP, following its bindinhg to myosin. The myosin heads develops cross bridges after the binding of troponin and calcium together to generate tropomyosin. When the pi and ADP are released, it results to sliding of the actin towards the sarcomere center to generate power stroke. Following the process, the ATP is consumed to facilitate body temperature and heart rate rise causing homeostasis. ”4. Explain why rigor mortis occurs. ” Rigor mortis occurs during partial contraction of the muslces and fails to enter relaxed state owing to lack of oxygen or blood flowin in the system. . Experiment 1: Tendons and Ligaments Post-Lab Questions ”1. Label the arrows in the slide images below based on your observations from the experiment. ” A- chondrocytes B- collagen C- collagen fibers D- skeletal muscle fiber E- nuclei F- collagen fibers [Show More]

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