Dr. Jones Heart Module Review Questions

Increasing the number of slow Ca²⁺ channels open in the sinoatrial node increases heart rate.

• True

• False

Slow Na+ channels set the heart rate

• True

• False

The pulmonary veins return oxygen depleted blood to the right atrium.

• True

• False

    The vena cava returns deoxygenated blood to the right atrium

• True

• False

Veins carry blood away from the heart.

• True

• False

Veins carry blood to the heart

• True

• False

A greater pressure in the right ventricle than the aorta causes the aortic semilunar valve to open. 

• True

• False

A greater pressure in the left ventricle than the aorta causes the aortic semilunar valve to open. 

• True

• False

An ECG lacking a T wave would occur if the sinoatrial node were not functioning. 

• True

• False

   T-wave is ventricular repolarization, a lack of a p-wave would indicate SA node dysfunction

• True

• False