Multiple Choice
Which of the following proteins makes up the thick filament of the sarcomeres?
9. Muscle Tissue
Sliding Filament Theory and the Sarcomere
Back9. Muscle Tissue
Sliding Filament Theory and the Sarcomere
- Multiple ChoiceIn the context of the sliding filament theory, what protein primarily composes the thin myofilaments within a skeletal muscle sarcomere?
- Multiple ChoiceThin filaments are composed of how many strands of fibrous actin?
- Multiple ChoiceWhich two proteins slide past each other in the sliding filament theory of muscle contraction?
- Multiple ChoiceWhat is the area in the center of the A band where there are no actin myofilaments?
- Multiple ChoiceWhat is the consequence if the myosin heads cannot bind to the actin during muscle contraction?
- Multiple ChoiceWhich of the following regions of a sarcomere contain thin filaments?
- Multiple ChoiceWhich of the following is most directly required to initiate the coupling of myosin to actin in the sliding filament theory?
- Multiple ChoiceWhat is the role of calcium in the cross-bridge cycle during muscle contraction?
- Multiple ChoiceWhich of the following best describes the term 'Z line' in the context of the sliding filament theory and the sarcomere?
- Multiple ChoiceIn the sliding filament theory, what causes the myosin head to disconnect from actin?1views
- Multiple ChoiceWhat happens when a myosin head releases from actin during muscle contraction?
- Textbook Question
Mark the following statements as true or false. If a statement is false, correct it to make a true statement.
Muscle fibers generate more tension if the starting length of their sarcomeres is very short.
2views - Multiple ChoiceWhat happens when troponin and tropomyosin block the active sites of actin in the sarcomere?
- Multiple ChoiceIn the context of sliding filament theory, what is the basic functional (contractile) unit of skeletal muscle?