Cardiac Muscle Tissue Structure Quiz

Conduct action potentials and promote muscle contraction

Trigger the release of adrenaline and cortisol

Maintain structure and enhance molecular and electrical connections (correct)

Coordinate the release of calcium ions and regulate aerobic metabolism

Cardiocytes have short, wide T tubules, while skeletal muscle cells have long, narrow T tubules

Cardiocytes have intercalated discs, while skeletal muscle cells do not (correct)

Cardiocytes have multiple nuclei, while skeletal muscle cells have a single nucleus

Cardiocytes rely on aerobic metabolism, while skeletal muscle cells use anaerobic metabolism

Cardiac muscle fibers are connected via gap junctions, while skeletal muscle fibers are not

Cardiac muscle contractions are regulated by the autonomic nervous system, while skeletal muscle contractions are voluntary

Cardiac muscle cells have triads, while skeletal muscle cells have SR with no terminal cisternae

In cardiac muscle, contraction occurs by sliding thin filaments, while in skeletal muscle it occurs by myosin/actin cross bridges (correct)

<p>Link heart cells mechanically, chemically, and electrically</p> Signup and view all the answers

<p>Cardiac and smooth muscles are involuntary and regulated by the autonomic nervous system</p> Signup and view all the answers