Heart and Circulatory System Quiz Part 2

The lymphatic system is connected to blood circulation.

• True

• False

Sphincters in microcirculation help divert blood to areas that need it most.

• True

• False

Cardiac muscle contraction is influenced by action potentials at the cellular level.

• True

• False

Unidirectional blood flow in the heart is maintained by the valves.

• True

• False

The heart contracts through a process involving calcium ions.

• True

• False

Valve disease does not affect the flow of blood in the heart.

• True

• False

The cardiac cycle includes both the systolic and diastolic phases.

• True

• False

Heart failure is often due to issues with the heart's pumping ability.

• True

• False

Smooth muscle cells and cardiac muscle cells have identical functions.

• True

• False

The heart's electrical signals originate in the AV node.

• True

• False