Cardiac Muscle Tetanus and Contractions Quiz

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Can cardiac muscle undergo tetanus?

Yes, but only under certain experimental conditions

No, it cannot undergo tetanus due to differences in muscle physiology (correct)

No, but it can exhibit sustained contraction under certain conditions

Yes, it can undergo tetanus just like skeletal muscle

What is the primary reason why cardiac muscle cannot undergo tetanus?

Lack of myosin and actin filaments

Lower energy production by mitochondria

Presence of a longer refractory period (correct)

Higher resistance to calcium ions

In what way does cardiac muscle differ from skeletal muscle regarding tetanus?

Skeletal muscle has a longer action potential duration

Cardiac muscle contracts more rapidly

Cardiac muscle has a higher myoglobin content

Skeletal muscle has a shorter refractory period (correct)

Under what circumstances can cardiac muscle exhibit sustained contraction?

In response to electrical stimulation Signup and view all the answers

Can cardiac muscle exhibit sustained contraction due to tetanus?

No, it lacks the ability to generate tetanic contractions Signup and view all the answers

What is the primary reason for the inability of cardiac muscle to undergo tetanus?

Inherent refractory period of cardiac muscle cells Signup and view all the answers

How does cardiac muscle differ from skeletal muscle regarding tetanus?

Cardiac muscle lacks the ability to generate tetanic contractions unlike skeletal muscle Signup and view all the answers

Under what circumstances can cardiac muscle exhibit continuous contraction?

During pathological conditions such as heart failure Signup and view all the answers

Why is it not possible for cardiac muscle to undergo tetanus?

Cardiac muscle has a longer refractory period compared to skeletal muscle. Signup and view all the answers

What is the primary reason for the inability of cardiac muscle to exhibit sustained contraction due to tetanus?

Cardiac muscle has a lower myosin-ATPase activity compared to skeletal muscle. Signup and view all the answers

What distinguishes cardiac muscle from skeletal muscle regarding its susceptibility to tetanus?

Cardiac muscle exhibits spontaneous depolarization, preventing the occurrence of tetanus. Signup and view all the answers

Under what circumstances can cardiac muscle exhibit continuous contraction?

During sympathetic stimulation leading to an increase in calcium influx. Signup and view all the answers

Cardiac Muscle Tetanus and Contractions Quiz

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Questions and Answers

Can cardiac muscle undergo tetanus?

What is the primary reason why cardiac muscle cannot undergo tetanus?

In what way does cardiac muscle differ from skeletal muscle regarding tetanus?

Under what circumstances can cardiac muscle exhibit sustained contraction?

Can cardiac muscle exhibit sustained contraction due to tetanus?

What is the primary reason for the inability of cardiac muscle to undergo tetanus?

How does cardiac muscle differ from skeletal muscle regarding tetanus?

Under what circumstances can cardiac muscle exhibit continuous contraction?

Why is it not possible for cardiac muscle to undergo tetanus?

What is the primary reason for the inability of cardiac muscle to exhibit sustained contraction due to tetanus?

What distinguishes cardiac muscle from skeletal muscle regarding its susceptibility to tetanus?

Under what circumstances can cardiac muscle exhibit continuous contraction?

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