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Questions and Answers
Which organelle is responsible for storing and releasing Ca2+ in muscle cells?
Which organelle is responsible for storing and releasing Ca2+ in muscle cells?
- Nuclei
- Transverse tubules (T-tubules)
- Sarcoplasmic reticulum (SR) (correct)
- Mitochondria
What is the functional unit of muscle contraction?
What is the functional unit of muscle contraction?
- Sarcomere (correct)
- Mitochondrion
- Tendon
- Myofibril
What are the thin filaments in a muscle cell composed of?
What are the thin filaments in a muscle cell composed of?
- Actin, myosin, ATPase
- Actin, troponin, tropomyosin (correct)
- Actin, troponin, myosin
- Actin, tropomyosin, myosin
What is the function of T-tubules in muscle cells?
What is the function of T-tubules in muscle cells?
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Which structure divides a muscle cell into sections and is considered the functional unit of muscle contraction?
Which structure divides a muscle cell into sections and is considered the functional unit of muscle contraction?
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