Podcast
Questions and Answers
What happens to the troponin molecule when calcium ions bind to it?
What happens to the troponin molecule when calcium ions bind to it?
- It releases the myosin head from the actin filament
- It pulls the tropomyosin molecule away from the F actin (correct)
- It moves towards the F actin
- It breaks the actomyosin complex
What is the name of the theory that explains how actin filaments slide over myosin filaments during muscular contraction?
What is the name of the theory that explains how actin filaments slide over myosin filaments during muscular contraction?
- Sliding Theory
- Walking Theory
- Ratchet Theory
- All of the above (correct)
What is the result of the tilting movement of the myosin head during muscle contraction?
What is the result of the tilting movement of the myosin head during muscle contraction?
- The actin filament is dragged along with the myosin head (correct)
- The actin filament is pushed away from the sarcomere
- The tropomyosin molecule moves towards the F actin
- The myosin head breaks away from the actin filament
What is the name of the complex formed during muscle contraction when actin filaments slide over myosin filaments?
What is the name of the complex formed during muscle contraction when actin filaments slide over myosin filaments?
What is the role of calcium ions in the muscle contraction mechanism?
What is the role of calcium ions in the muscle contraction mechanism?
What is the result of the repeated tilting movement of the myosin head during muscle contraction?
What is the result of the repeated tilting movement of the myosin head during muscle contraction?
What happens when acetylcholine is released from the motor endplate?
What happens when acetylcholine is released from the motor endplate?
What is the function of the 'T' tubules?
What is the function of the 'T' tubules?
What is the role of calcium ions in muscle contraction?
What is the role of calcium ions in muscle contraction?
What happens to the active site of F actin in the relaxed condition?
What happens to the active site of F actin in the relaxed condition?
What is the result of the action potential reaching the cisternae of 'L' tubules?
What is the result of the action potential reaching the cisternae of 'L' tubules?
What happens when calcium ions move towards the actin filaments?
What happens when calcium ions move towards the actin filaments?
What is the result of the graded potential hyperpolarizing the membrane potential?
What is the result of the graded potential hyperpolarizing the membrane potential?
During muscle contraction, what happens to the actin filaments?
During muscle contraction, what happens to the actin filaments?
What is the process that occurs between the excitation and contraction of the muscle?
What is the process that occurs between the excitation and contraction of the muscle?
What is the name of the complex formed during muscle contraction?
What is the name of the complex formed during muscle contraction?
What is the zone that is broad in the relaxed state of the muscle?
What is the zone that is broad in the relaxed state of the muscle?
How many stages are involved in the molecular mechanism of muscular contraction?
How many stages are involved in the molecular mechanism of muscular contraction?
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