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Questions and Answers
What causes a conformational change in troponin?
What causes a conformational change in troponin?
- Ca++ not binding to troponin
- Movement of the entire troponin-tropomyosin complex (correct)
- ADP & Pi binding to troponin
- ATP binding to troponin
During crossbridge cycling, what provides energy to 'cock' the myosin head?
During crossbridge cycling, what provides energy to 'cock' the myosin head?
- Tropomyosin exposing the myosin-binding site
- Reset of the myosin head (correct)
- Myosin binding to actin
- Ca++ splitting into ADP & Pi
When myosin heads attach to the exposed binding sites on actin, what is the result?
When myosin heads attach to the exposed binding sites on actin, what is the result?
- Ca++ moves away from the troponin
- Troponin covers the myosin-binding site
- ATP binds to the myosin head
- Tropomyosin is released from the myosin-binding site (correct)
What is the result of ADP & Pi release during a power stroke?
What is the result of ADP & Pi release during a power stroke?
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What is the consequence of Ca++ & ATP absence during cycling?
What is the consequence of Ca++ & ATP absence during cycling?
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What toxin leads to spastic paralysis known as tetanus?
What toxin leads to spastic paralysis known as tetanus?
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