Cardiac Muscle Function
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Questions and Answers

Troponin I regulates Ca2+ release to initiate contraction

False (B)

The crossbridge cycle is explained by the Sliding Filament Theory

True (A)

Troponin C regulates Ca2+ release to initiate relaxation

False (B)

The crossbridge cycle is initiated by the binding of Ca2+ to Troponin I

<p>False (B)</p> Signup and view all the answers

During diastole, ATP binds to myosin, which can interact with actin

<p>False (B)</p> Signup and view all the answers

The power stroke is created by the bending of the actin filament

<p>False (B)</p> Signup and view all the answers

Troponin T moves tropomyosin to release its inhibitory effect on contraction

<p>True (A)</p> Signup and view all the answers

ATP is hydrolyzed before the myosin head attaches to actin

<p>False (B)</p> Signup and view all the answers

The crossbridge cycle consists of only three steps

<p>False (B)</p> Signup and view all the answers

Upon Ca2+ stimulation, the troponin complex blocks tropomyosin

<p>False (B)</p> Signup and view all the answers

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