Multiple Choice
Which muscle fiber component is responsible for storing and releasing calcium ions during muscle contraction?
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4. Tissues & Histology
Introduction to Muscle Tissue
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Which structure is responsible for the striated appearance of skeletal muscle tissue?
A
Sarcomere
B
Nucleus
C
Mitochondrion
D
Sarcoplasmic reticulum
Verified step by step guidance1
Understand the striated appearance of skeletal muscle tissue: Skeletal muscle tissue has a striped or striated appearance due to the arrangement of contractile proteins within the muscle fibers.
Learn about the sarcomere: The sarcomere is the functional unit of a muscle fiber and is responsible for the striated appearance. It consists of repeating units of actin (thin filaments) and myosin (thick filaments) organized in a specific pattern.
Identify the role of the nucleus: The nucleus is the control center of the cell, containing genetic material, but it does not contribute to the striated appearance of skeletal muscle tissue.
Understand the function of mitochondria: Mitochondria are responsible for energy production in the cell, but they do not play a role in the striated appearance of skeletal muscle tissue.
Learn about the sarcoplasmic reticulum: The sarcoplasmic reticulum is involved in calcium storage and release during muscle contraction, but it does not contribute to the striated appearance. The striations are specifically due to the sarcomere structure.
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