56. Calcium ions are very important for skeletal muscle contraction and are the key to
initiating the transverse bridge cycle. Which of the following statements is correct?
(A) Released through sarcoplasmic reticulum calcium channels
(B) Enter the cytoplasm through the calcium channel of the muscle cell membrane
(C) Enter the cytoplasm through the motor end-plate calcium channel
(D) Recycled to mitochondria by active calcium pump transport
76. The characteristics of Curriculum Guidelines of 12- Year Basic Education in Health and
Physical Education area is not including:
(A) Connect with the world of experience (B) Compilation of flexible textbooks
(C) Grades 1 to 12 coherent (D) Discover talent
49. In the swimming competition, what kind of swimming posture can be at the start and
turns, a swimmer is permitted one or more leg kicks and one arm pull under the water,
which must bring him to the surface? It shall be permissible for a swimmer to be
completely submerged for a distance of not more than 15 meters after the start and after
each turn. When by that point, the head must have broken the surface. The swimmer
must remain on the surface until the next turn or finish.
(A) Backstroke (B) Breaststroke (C) Freestyle (D) Butterfly