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Cardiac vs

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Questions and Answers

Which type of muscle has intercalated discs between muscle cells?

Smooth muscle

Skeletal muscle

Cardiac muscle (correct)

Both cardiac and skeletal muscle

What is the main difference between cardiac and skeletal muscle?

Cardiac muscle has actin and myosin filaments, while skeletal muscle does not

Cardiac muscle is found in the heart, while skeletal muscle is found in the limbs

Cardiac muscle is striated, while skeletal muscle is not

Cardiac muscle has intercalated discs, while skeletal muscle does not (correct)

What is the function of intercalated discs in cardiac muscle?

To allow for rapid transmission of action potentials between muscle cells (correct)

To provide electrical insulation between muscle cells

To anchor actin and myosin filaments in place

To increase the strength of muscle contractions

Which type of muscle is a syncytium of many cells?

Cardiac muscle Signup and view all the answers

What is the role of the atrioventricular (A-V) junction in the heart?

To insulate the atrial syncytium from the ventricular syncytium Signup and view all the answers

What causes the twisting motion of the left ventricle during systole?

The contraction of the outer subepicardial layer Signup and view all the answers

What happens to the left ventricle at the end of systole?

It recoils or untwists during diastole Signup and view all the answers

What is the function of the left ventricular twist (torsion) during ventricular ejection?

To facilitate the movement of blood out of the ventricle Signup and view all the answers

Which direction does the apex of the heart rotate during systole?

Clockwise Signup and view all the answers

What allows blood to rapidly enter the left ventricle during diastole?

The recoil of the left ventricle Signup and view all the answers

Which type of drug delivery system is used for a local effect?

Topical oils in joint pain Signup and view all the answers

Which type of drug delivery system is used for a systemic effect?

Systemic delivery Signup and view all the answers

Which type of drug delivery system is used for a local effect but can also have a systemic effect?

Laxative poultice on navel Signup and view all the answers