A Posterior Infarction Is Usually Caused by Occlusion of Which

question 40

Multiple Choice

A posterior infarction is usually caused by occlusion of which coronary artery?

• A)Left main
• B)Circumflex
• C)Left anterior descending
• D)Right coronary artery

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Definitions:

Myoblasts

Precursor cells that can differentiate into muscle tissue during growth or the healing process.

Myofibrils

Long, filamentous organelles found in muscle cells that are crucial for muscle contraction and composed of sarcomeres.

Sarcomere

The basic contractile unit of muscle fiber, consisting of actin and myosin filaments between two Z lines.

Z Disk

Delicate, membranelike structure found at each end of a sarcomere to which actin myofilaments attach.