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Muscle Contraction Quiz

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Questions and Answers

What is the protein that composes the thick myofilaments?

Troponin

Tropomysin

Actin

Myosin (correct)

What are the small regular projections on each myosin filament called?

Tropomysin

Troponin

Crossbridges (correct)

Actin

What are the two additional proteins found in the thin myofilaments?

Myosin and actin

Myosin and troponin

Actin and tropomysin

Troponin and tropomysin (correct)

What causes the myosin crossbridges to interact with the actin receptor sites?

The presence of calcium ions Signup and view all the answers

What happens to the actin filaments during muscle contraction?

They slide past the myosin filaments Signup and view all the answers

What is homeostasis?

The ability of the body to maintain a stable internal environment Signup and view all the answers

Which of the following is an example of a function controlled by homeostasis mechanisms?

Breathing Signup and view all the answers

What are some of the adaptive mechanisms that maintain homeostasis?

Chemical substances called hormones Signup and view all the answers

Muscle Contraction Quiz

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Questions and Answers

What is the protein that composes the thick myofilaments?

What are the small regular projections on each myosin filament called?

What are the two additional proteins found in the thin myofilaments?

What causes the myosin crossbridges to interact with the actin receptor sites?

What happens to the actin filaments during muscle contraction?

What is homeostasis?

Which of the following is an example of a function controlled by homeostasis mechanisms?

What are some of the adaptive mechanisms that maintain homeostasis?

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