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Questions and Answers
Which type of muscle is characterized by the presence of intercalated discs?
Which type of muscle is characterized by the presence of intercalated discs?
- Cardiac muscle (correct)
- Skeletal muscle
- Striated muscle
- Smooth muscle
What is the primary function of the sarcoplasmic reticulum (SR) in muscle cells?
What is the primary function of the sarcoplasmic reticulum (SR) in muscle cells?
- Cellular communication
- Regulating calcium levels (correct)
- Energy production
- Protein synthesis
Which component is NOT part of the triad junction in muscle fibers?
Which component is NOT part of the triad junction in muscle fibers?
- Myofibril (correct)
- Sarcoplasmic reticulum
- Actin filaments
- T-tubule
What is the fundamental unit of contraction in a muscle fiber?
What is the fundamental unit of contraction in a muscle fiber?
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Which type of muscle lacks striations?
Which type of muscle lacks striations?
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