Practice Mechanism of Contraction: Sliding Filament Theory - 1.1.3 | The Body 3 – Health & Physiology | IB MYP Grade 8 Physical and Health Education
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1.1.3 - Mechanism of Contraction: Sliding Filament Theory

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Learning

Practice Questions

Test your understanding with targeted questions related to the topic.

Question 1

Easy

What are the two main proteins involved in muscle contraction?

💡 Hint: Think about the basic building blocks of muscle fibers.

Question 2

Easy

What is the role of calcium in muscle contraction?

💡 Hint: Consider what is needed to activate the muscle fibers.

Practice 4 more questions and get performance evaluation

Interactive Quizzes

Engage in quick quizzes to reinforce what you've learned and check your comprehension.

Question 1

What is the main hypothesis of the sliding filament theory?

  • a) Myofilaments shorten during contraction
  • b) Myofilaments slide past each other
  • c) Myofilaments dissolve during contraction

💡 Hint: Focus on the movement of the filaments.

Question 2

True or False: The binding of ATP to myosin head is necessary for muscle contraction.

  • True
  • False

💡 Hint: Think about when ATP is utilized in the muscle movement process.

Solve 2 more questions and get performance evaluation

Challenge Problems

Push your limits with challenges.

Question 1

If ATP is depleted in muscle cells, what impact will it have on muscle contraction? Discuss the implications on both the short-term and long-term performance of muscles.

💡 Hint: Think about what happens during exhaustion, and relate that to ATP's role.

Question 2

Design an experiment using isolated muscle fibers to determine how changes in calcium concentration affect muscle contraction strength. Outline the key steps.

💡 Hint: Consider the relationship between calcium and the sliding filament theory.

Challenge and get performance evaluation