The _____ of the muscle attaches to the bone that is stationary during movement.a. originb. diaphysisc. insertiond. None of these are correct.

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The location of a muscle’s insertion and origin candetermine ________.a. actionb. the force of contractionc. muscle named. the load a muscle can carry

Which of the following is true regarding internal/external rotation of the knee? A. Can occur at any angle of knee flexion B. Greater range of motion in internal rotation C. During initial flexion from full extension, knee must unlock by externally rotating D. The popliteus is the muscle responsible for “unlocking” the knee

post a diagram on how a muscle sarcomere contracts. please make reference to the parts of the sarcomere, it is located, the role of calcium, the role of the neuron and ACh.

Which of the following factors is/are responsible for muscular fatigue? (Circle all that apply.) a. Accumulation of chemicals, including calcium and phosphate ions b. Depletion of key metabolic fuels, such as creatine phosphate c. Decreased availability of oxygen d. Psychological and environmental factors e. Increased blood flow to the muscle

Which of the following statements relating to the developmental aspects of muscles is false? a. All muscle tissue types arise from myoblasts b. Skeletal muscles become amitotic while smooth muscles regenerate throughout life c. Sarcopenia begins by age 30 and is irreversible d. Body strength per unit muscle mass is the same in both sexes  e. none of the above   Which of the following structures is located in the head region of the thick filament myosin? a. actin binding site b. ATP binding site c. ATPase enzyme d. all of the above e. none of the above

Skeletal muscles can only produce a mechanical force as they are contracted, but a leg flexes and extends while walking. How can muscles perform this task?

During sarcomere contraction, _________ first has to bind to ________ Select one: a. Calcium, troponin b. Calcium, microfilaments c. Sodium, troponin d. Sodium tropomysin e. Potassium, microfilaments