All of the following characteristics apply to skeletal muscle except

Which of the following is a microscopic feature of a skeletal muscle fiber? a. It contains multiple nuclei that are centrally located b. it contains myoglobin for oxygen storage c. it contains glycosomes for glycogen storage d. a and b e. b and c

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

Which of the following statements about the microscopic structure of smooth muscle fibers is incorrect? a. smooth muscle cells lack myofibrils, sarcomere, and t-tubules b. smooth muscle cells contain endomysium only c. smooth muscles cells contain caveolae that sequesters calcium ions d. all of the above e. none of the above

Which of the following statements are true of the neuromuscular junction? (Read carefully and select all the correct statements.)   A. A synapse is the space between two muscle fibers. B. Acetylcholine is released from vesicles in the sarcolemma. C. The axon terminal is the end of a sensory neuron. D. Acetylcholine makes the sarcolemma more permeable to calcium ions. E. Cholinesterase is an enzyme that destroys acetylcholine so that the impulse will continue at the same strength. F. The receptors for acetylcholine are in the sarcolemma.

Which of the following could prevent skeletal muscle from contracting?   Select one or more: a. Preventing calcium from surrounding myofibrils. b. Maintaining high levels of calcium around myofibrils c. Preventing sodium from entering a cell d. Allowing constant entry of sodium into a cell

In an isometric contraction, the muscle develops tension but does not: a.  Expend energy.b. Exhibit elasticity.c. Lengthen.d. Conduct electrical current.e. Widen

Which of the following is true concerning the role of Calcium in the contraction ofmuscle-cells?A. skeletal muscle cells require a burst of calcium from the sarcoplasmic reticulum.B. smooth muscle cells require a burst of calcium from the sarcoplasmic reticulum.C. cardiac muscle cells require a burst of calcium from the sarcoplasmic reticulum.D. All of the above are correct

If a tendon runs longitudinally throughout a muscle and fascicles insert obliquely on it along both sides, the muscle is classified as:- a. parallel. d. convergent. b. oblique. e. multipennate. c. bipennate

Tendon sheaths a.help anchor the tendon to the muscle b.act as friction-reducing structures c.are extensions of periosteum  d.are lined with dense irregular connective tissue