During vigorous effort in muscle cells, ATP stores are quickly depleted. However, creatine phosphate can donate a phosphate to regenerate ATP to sustain effort. In other words, creatine phosphate has a higher phosphoryl transfer potential than ATP? a. False O b. True
Q: Which is a false statement about skeletal muscle structure?a. A myofibril is composed of multiple…
A: Skeletal or Striated muscle- These are present on muscles that are associated with the skeleton.
Q: muscle cells are made up of? A. Z bars b. actin c. myosin d. myofibrils
A: Muscles are soft tissues found in most of the animals. Functions of muscles are to produce motion…
Q: While running, we expect the amount of calcium outside the sarcoplastic reticulum, inside the muscle…
A: In this question asked about calcium level in muscle during running. Detailed solution in step 2.
Q: A student athelete measured his running performance on a treadmill and found the following data: 15…
A: There are two main types of skeletal muscle fibers. They are type I (slow-twitch muscle fibers) and…
Q: An energy storage compound that can be stockpiled in muscle cells for short-term use is (a)…
A: Creatine phosphate - is an energy storage compound that can be stock piled in muscle cells for short…
Q: Indicate three ways that muscle cells can generate ATP
A: Tissue is the next level organization of the cells. There are 4 different types of tissue are…
Q: During muscle isometric tension, the maximum tension occurs when: O a. There is no overlapping…
A: Isometric contraction occurs when muscle length remains relatively constant as tension is produced.…
Q: The function of Ca2+ in skeletal muscle contraction is toa. cause an allosteric change in myosin so…
A: Skeletal muscles are a special type of muscles made up of contractile tissue. They are a type of…
Q: Muscular atrophy occurs when: A. A patient lacks the coordination needed to walk normally. B. Muscle…
A: Muscular atrophy refers to the loss of skeletal muscle. The atrophied muscle normally smaller and…
Q: The function of ATP during muscle contraction is toa. cause an allosteric change in myosin so it…
A: ATP(adenosine triphosphate) causes an allosteric change on myosin so it detaches from actin and…
Q: In 2013, Zach Bitter set a new record for running a 100 mile Ultra-Marathon in less than 12 hours.…
A: The muscle fiber is an individual muscle cell that consists of hundreds or thousands of myofibrils.…
Q: What would be affected if the globular head of myosin was misshapen? a) The ability to bind to…
A: Myosin is a protein, but specifically, a motor protein and a fibrous globulin of muscle that can…
Q: Describe the process of skeletal muscle contraction, beginning with an action potential in a motor…
A: Skeletal muscles are voluntarily controlled.
Q: In muscle cells, magnesium ions compete with calcium ions for binding sites on troponin molecules.…
A: Calcium triggers contraction by reaction with regulatory proteins that in the absence of calcium…
Q: if, in a laboratory, a skeletal muscle cell receives a single stimulus to contract, it produces a…
A: As per our honor code, we are authorized to answer only one question at a moment. So, we are…
Q: In relaxed muscle, the myosin-binding site on actin is blocked by ________. a. titin b. troponin c.…
A: Tropomyosin is known to block myosin-binding sites on actin molecules. It prevents the formation of…
Q: Muscle fatigue is caused by ________. a. buildup of ATP and lactic acid levels b. exhaustion of…
A: All living cells require energy to continue the physiological functions. For extracting energy they…
Q: The series-elastic component of muscle contraction is responsible for a.increased muscle shortening…
A: Muscle is a delicate tissue found in many creatures, and is one of the four fundamental creature…
Q: During which phase of the crossbridge cycle is ATP split into ADP and Pi? A. Immediately preceding…
A: Cross bridge cycling refers specifically to the action of the cross-bridge, that being the head and…
Q: In human resting muscle cells, the concentration of ATP is 4 mM, ADP is 0.013 mM, creatine-phosphate…
A: Muscle fibers are a type of cell found throughout the muscular system. This fiber's primary job is…
Q: During the cross-bridge in muscle cells, myosin motors hydrolyzes ATP as a fuel to create a pulling…
A: Skeletal muscles are a special type of muscles made up of contractile tissue. They are a type of…
Q: Find the false statement about white muscle fibers (glycolytic fibers)? Se ect one: a. Fiber…
A: Depending upon the presence or absence of myoglobin muscle fibres can be of two types that is ref…
Q: Creatine phosphate in muscle cells a is utilized during the excess post-exercise oxygen…
A: Creatine phosphate is the high-energy, phosphate-storage molecule of muscle. They are mostly found…
Q: The purpose of transverse tubules is to Select one: a. ensure a supply of glycogen throughout the…
A: Transverse tubules are basically the structures present in the muscles,they are the invaginations or…
Q: The excess ATPs are stored in muscles as CPs? A. True B. False
A: Adenosine triphosphate (ATP) is a three-phosphate nucleotide. The addition of phosphorous to the…
Q: Which of the following statements is true about the control of muscle glycogen phosphorylase? a) It…
A: The statement A i.e. It is activated by phosphorylation by an active phosphorylase kinase is TRUE.
Q: One of the primary reasons that one individual is faster in a 50-meter sprint than another is a. a…
A: The speed of a person is dependent on the type of muscle fiber that is present in an individual. The…
Q: In which of the following types of exercise would creatine phosphate (CP) be an important source of…
A: Introduction The phosphate-storage molecule group includes creatine phosphate. This chemical can be…
Q: According to the book, glycogen reserves in a muscle cell will provide more ATP than the creatine…
A: Glycogen is made up of glucose monomers. Glucose molecules serve as the primary source of energy.…
Q: Based on what you know about the neuromuscular junction and muscle contraction, describe very…
A: The neuromuscular junction is The portion at which the neuron axon terminal meets the skeletal…
Q: During muscle contraction, the ion that leaks out of the sarcoplasmic reticulum and induces…
A: Ions of calcium diffuse through muscle fibres. The contraction occurs as the relationship between…
Q: catalyzes the reaction that creates creatine phosphate in skeletal muscle A Creatine phosphatase…
A: Creatine phosphate is the main high-energy, phosphate-storage molecule of muscle.It is primarily…
Q: Muslce tissue contains enough creatine phosphate (CP) to sustain physical activity for 10 to 15…
A: Muscle tissue is composed of cells that possess the ability to contract to produce movements in the…
Q: The prospect of inhibiting myostatin and growing larger muscles may be tempting to a great many…
A: Muscles are the soft tissues present in the body and the cells consists of the protein filaments…
Q: Which of the following statements about skeletal muscle is CORRECT? Select one: a. An increase in…
A: Muscle tissue is made up of cells that contract (become shorter) when stimulated by the nervous…
Q: catalyzes the reaction that creates creatine phosphate in skeletal muscle A. Creatine phosphatase B.…
A: Creatine phosphate is a phosphorylated creatine molecule, which serves as a rapidly mobilizable…
Q: Which statement about striated skeletal muscle is true? A. The tension generated by a muscle is…
A: Muscle contains muscle fiber cells which are specialized for contraction. Based on location,…
Q: The transverse tubular system: A)speeds the transmission of an action potential down the length of a…
A: *Tansverse tubular system is a network of interconnecting rings that surrounds a myofibril. *It…
Q: Predict the effect of the following on muscle contraction: A. Bitten by a black widow B. Curare C.…
A: Muscle contraction refers to the generation of tension at specific sites in the muscle fibers. It…
Q: Outline the role of calcium ions on muscle contraction during a biceps curl. In your answer: A)…
A: The muscle cells possess electrical excitability and contraction properties. Their contraction…
Q: What is meant by the overload principle? A. Stretching a muscle group beyond the joint's range of…
A: To develop any area of physical fitness, the overload principle states that the person must…
Q: A muscle contraction is initiated by Select one: a. adenosine diphosphate (ADP) b. adenosine…
A: Answer1-d. A nerve impulse. Muscle contraction begins when the nervous system generates a signal.…
Q: Refer to the figure below. VI ATP II ADP II ADP ADP (P) Reference: Ref 20-2 In the figure, which…
A: Myosin filament - two heavy spiral chains wrapped each other. Actin filament - it is double atender,…
Q: During low intensity, long-duration exercise (long-distance running, for example), fatigue is NOT…
A: There are two types of exercises: low intensity-high duration and high-intensity short duration.…
Q: oxidize glucose to pyruvate and then release lactic acid into the bloodstream
A: Glycolysis is one of the most important metabolic pathways taking place inside the cell. It occurs…
Q: Explain the concept of the following in regard to muscle cells: power stroke does not need to be a…
A: The process of muscle contraction is initiated when calcium ions bind to troponin protein complex.…
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- Explain why (a) calcium ions and (b) ACh are vital for muscle contraction.After death, a person no longer makes ATP, so calcium stored in the sarcoplasmic reticulum diffuses down its concentration gradient into the muscle cytoplasm. This result is rigor mortis----an unbreakable state of muscle contraction that stiffens the body for a few days until muscles begin to decay. Explain why this contraction occurs.Discuss why fast glycolytic fibers have more glycogen stores than slow oxidative fibers.
- Weight training causes fast glycolytic fibers to hypertrophy (increase in diameter). Explain why this increases strength.Discuss the difterences between the three fiber types: slow-twitch. fast-twitch oxidative-glycolytic and fast-twitch glycolytic fibers. a. Be prepared to discuss their fatigue properties and how their preferred mechanism of metabolism relates to their fatiguability. What properties relate to speed at which they contract?Image A Image B Z M F. The images above represent the contracting unit of a muscle fiber. Using the images shown, answer the following questions. Be sure that you label your answers a, b and c. a. What is a contracting unit of a myofibril called? b. Which image represents a myofibril that is fully contracted? c. Explain how you derived your answer to part b. Be sure to use the words for the myofilaments that are involved in muscle contraction in your answer.
- Considering the Length-Tension Relationship of skeletal muscle fibers, over stretching a muscle fiber or not stretching a muscle fiber enough, results ina decrease in force developed (during contraction) because: 27. A. An "over-stretched" muscle fiber or an “under-stretched" muscle fiber will not allow Calcium, from the sarcoplasmic reticulum, to adequately diffuse into the cytoplasm. B. An "over-stretched" muscle fiber or an "under-stretched" muscle fiber will not allow an optimum amount of contact and overlap for the contractile proteins. C. An "over-stretched" muscle fiber or an“under-stretched" muscle fiber will not allow the Action Potential to reach the troponin-activation channels. D. An "over-stretched" muscle fiber or an "under-stretched" muscle fiber will not allow the Sodium current to depolarize the membrane. Teurons toMuscle fatigue occurs because of.. A relative deficit of ATP Excessive accumulation of lactic acid Ionic imbalances Depletion of nutient stores All of the aboveMuscle Fiber Types 4 Which of these statements is true about leg muscle fibers from an Olympic sprinter versus an Olympic marathon runner? a. The speed of muscle contraction is similar. b. The amount of force generated by similar-sized muscle fibers is similar. c. The power generated by individual muscle fibers is similar. d. The predominant leg muscle fiber types are similar. O0000
- The filaments of skeletal muscle are moved by free energy derived from the hydrolysis of ATP. During sustained muscle contraction ATP levels remain fairly constant, while levels of creatine phosphate fall. Explain why this is so. Under what circumstances is an oxygen debt incurred during muscle contraction?In order to study and understand muscle diseases, one needs to have a good understanding of normal muscle function. Briefly outline the process of cross-bridge cycling in muscle contraction. Be sure to highlight the role of Ca2+ and ATP/ADP in the process.Define what the NMJ is and why it's important for muscle contraction. Explain in short the process of the NMJ signaling the muscle to contract. Note the difference between a motor unit and the NMJ.