QUESTION 7 What is pictured? OA. A fascicle O B. A sarcomere O C. Smooth muscle O D. Epimysium D A B C ப F H E D

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27- The calcium ions those are needed for muscle contraction are stored in: A. Transverse tubules C.Sacrolemma B. Sacroplasmic reticulum D. Sacromere

Which of the following is a form of activity .9 characterized by movement and energy expenditure اختر أحد الخيارات a. Rest b. Endurance c. Stamina d. Exercise

1. This type of muscle is controlled involuntarily. A. d - a, b, & c B. c - smooth C. d - b & c D. a - skeletal E. b - cardiac

The condition rigor mortis develops several hours after death, it is characterized by muscular rigidity, it happens because   a. Because of a lack of ATP   b. Because actin can’t detach from the myosin head   c. At death, calcium ions leak out of the SR and trigger a muscle contraction   d. a, b and c   e. Only a   f. Only c

Question 4 1 pts A, B, or C? Which muscle would be more affected by joint angular velocity? A B A is more affected than B. B is more affected than A. O A and B are equally affected.

When the weight is traveling upwards, what type of muscular contraction is taking place at the wrist joint? must watch video clip to answer https://www.youtube.com/watch?v=6pWu4Xko9qM a. Isometric b. Concentric c. Eccentric d. Isotonic

12. The _________________________ is the main functioning unit of muscle fibers and where the “action” takes place.  It is bordered at each end by _____________. A. sarcomere; Z lines B. actin; H bands C. myofilament; M lines D. tropomyosin; I bands

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