contraction. 3. The parts of the myofibrils that allow for it to extend out are called the sacomere. 4. The nerve cell that connects to several muscle fibers called a motor neuron. 5. The thick ones are protein myosin. The thin ones are protein actin. 6. The chemicals that stimulate the muscle to contract are called neurotransmitters 7. Acetylcholine contracts the muscles. 8. Acetylcholines are stored at the end of each motor neuron. 9. The combination of the motor neuron and the
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approximately 700 muscles. These in turn contain fibers‚ which are the basic functional units of muscles. Within these fibers are cylinder shapedbundles called myofibrils. These contain sarcomeres‚ which are made up of thick protein filaments known as actin and myosin. All of these components make up the two types of fibers‚ slow-twitch and fast-twitch. The muscles also contain 3 distinct tissues known as cardiac‚ skeletal‚ and smooth. Both cardiac and smooth muscle cells are under involuntary control
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reticulum—stores calcium ions Myofibrils consist of contractile proteins called ___________________. microfilaments Name the two types and what they’re composed of: _______________ thin filaments composed of ___________________ protien actin protien myosin thick filaments _______________ composed of ___________________ 8. Arrangement of myofilaments. Give the letter name of each band: Dark band → A band ___ I Light band → ___ band Match two definitions with each band:
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State University Elodea Wet Mount If cytoplasmic screening is occurring‚ you will see the chloroplast circulating around the cell. Cytoplasmic streaming is controlled by microfilaments in the cell’s cytoskeleton. These filaments of actin and myosin move cellular contents in an active process that uses energy released by breaking ATP down in ADP. How might a cell benefit by spending energy to circulate the cytoplasm? Cytoplasm in a cell is responsible for cell growth‚ reproduction
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Strength training typically produces a combination of the two different types of hypertrophy: contraction against 80 to 90% of the one repetition maximum for 2–6 repetitions (reps) causes myofibrillated hypertrophy to dominate (as in powerlifters‚ olympic lifters and strength athletes)‚ while several repetitions (generally 8 – 12 for bodybuilding or 12 or more for muscular endurance) against a sub-maximal load facilitates mainly sarcoplasmic hypertrophy (professional bodybuilders and endurance athletes)
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The objective of the experiment was to differentiate mammalian C2C12 cells into muscle cells and analyze for presence of myosin light chain. Utilizing Western Blotting techniques and using specific antibodies helped to detect myosin light chain. The hypothesis was that proliferating myoblasts could be induced to initiate the differentiation process by depriving the cells of the necessary growth factors and that the differentiation is characterized by the expression of muscle-specific proteins. The
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Laboratory – Muscle Physiology A. MUSCLE TONUS Observations‚ Report and Conclusion: A. Define muscle tonus and give its importance * Muscle tonus refers to a state of slight muscular contraction maintained by synchronous impulses of low frequency‚ discharged by the spinal motor neurons. * Reflex in nature. * Muscle tonus is a small amount of tension in the muscle due to weak‚ involuntary contractions of its motor units. Muscle tonus is important in a sense that it governs the
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Lab Report Electrophoresis: Using Electricity to Separate Molecules Answer the following questions about the results of this activity. Record your answers in the boxes. Send your completed lab report to your instructor. Don’t forget to save your lab report to your computer! Activity 1 – Calibration Record your data from Activity 1 in the boxes below. Enter the data (number of bands‚ description of the band patterns) you collected for the protein ladder in the appropriate columns
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Pig Trachealis Smooth Muscle Pharmomechanical coupling uses Internal Calcium stores whilst Electromechanical coupling uses Extracellular Calcium Crystal Nguyen School of Anatomy‚ Physiology and Human Biology‚ The University of Western Australia‚ WA‚ 6009 Introduction Smooth muscle contraction occurs when calcium is present in the smooth muscle cell and binds onto calmodulin to activate myosin light chain kinase (Wilson et al.‚ 2002). Phosphorylation of myosin light chains result in myosin
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Report The Aurelia aurita‚ also known as moon jellyfish‚ is a common species of jellyfish‚ which can be found in oceans around the world. They are hardy‚ and capable of living in acidic‚ polluted or poorly oxygenated water. Life Cycle of Moon jellyfish The polyps are the first stage of their life‚ hatching from eggs. The polyps undergo a process called strobilation‚ to enter the strobila stage‚ and then the juvenile stage‚ which are called ephyra. They then mature to enter the adult stage‚ known
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