3 The striations in skeletal muscle fibers are attributable to a. light and dark

Question

3 The striations in skeletal muscle fibers are attributable to a. light and dark pigments found in the sarcoplasm. b. the arrangement of thick and thin filaments in the myofibril. c. overlapping Z disks d. overlapping adjacent skeletal muscle fibers m www.chegg.com 4 The sarcoplasmic reticulum a. stores sodium ions. b. forms from inward extensions of the sarcolemma. c. stores calcium ions. d. is made of contractile proteins. 5 Fill in the blanks: Thick filaments are composed of the protein composed of the proteins and thin filaments a and Copyright Morton Publis

Explanation / Answer

3. The answer is
b) The arrangement of thick and thin filaments in the myofibril

4. The answer is
c) stores calcium ions.

It is like endoplasmic reticulam in normal cells, and the main function of sarcoplasm reticulam is storing of calcium ions.

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