Muscle Contraction and Myosin Structure

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What happens to Ca2+ ions after they initiate muscle contraction?

They are released into the bloodstream

They are pumped back into the SR for storage (correct)

They bind to troponin again

They bind to actin

What type of muscle contraction occurs when a muscle changes its length?

Isometric contraction

Concentric contraction

Isotonic contraction (correct)

Eccentric contraction

What is the term for the type of muscle contraction where the muscle shortens as it contracts?

Isometric contraction

Concentric contraction (correct)

Eccentric contraction

Isotonic contraction

What is the opposite type of contraction to concentric contraction?

Eccentric contraction Signup and view all the answers

What is the primary function of Ca2+ ions in muscle contraction?

To initiate muscle contraction Signup and view all the answers

What type of contraction occurs when a muscle contracts without changing its length?

Isometric contraction Signup and view all the answers

What is the result of summated Ca sparks in muscle contraction?

A single Ca2+ signal Signup and view all the answers

What happens to the muscle during relaxation?

Ca2+ unbinds from troponin Signup and view all the answers

What is the term for the type of contraction that occurs when lifting a weight?

Concentric contraction Signup and view all the answers

What is the term for the type of contraction that occurs when lowering a weight?

Eccentric contraction Signup and view all the answers

Muscle Contraction and Myosin Structure

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Questions and Answers

What happens to Ca2+ ions after they initiate muscle contraction?

What type of muscle contraction occurs when a muscle changes its length?

What is the term for the type of muscle contraction where the muscle shortens as it contracts?

What is the opposite type of contraction to concentric contraction?

What is the primary function of Ca2+ ions in muscle contraction?

What type of contraction occurs when a muscle contracts without changing its length?

What is the result of summated Ca sparks in muscle contraction?

What happens to the muscle during relaxation?

What is the term for the type of contraction that occurs when lifting a weight?

What is the term for the type of contraction that occurs when lowering a weight?

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